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00:00:00You are in the Atacama desert, north of Chile.
00:00:04It is one of the driest places on the planet.
00:00:07But this desert hides a pretty secret.
00:00:09Every 3 to 5 years, flowers grow from nowhere.
00:00:14That's why it's called the flowery desert.
00:00:17Seeds rest in the ground, waiting for just a little rain.
00:00:21When the desert receives enough water, about 200 types of flowers grow.
00:00:26The Atacama sand is made up of purple, white, green and pink.
00:00:32Another phenomenon that can be observed in the desert is the sand waterfall.
00:00:36When the wind pushes a lot of sand along a canyon, it starts to fall.
00:00:41If there is really a lot of it, it creates a sand waterfall, like in Saudi Arabia.
00:00:46It looks like the Niagara Falls, but without water.
00:00:49Locals say that this phenomenon comes from an imminent sandstorm.
00:00:54The circle of fairies, also known as the circle of fairies or mycelium annular,
00:01:00are mysterious circles of mushrooms that appear in prairies and forest areas.
00:01:05The reason why these perfect circles appear is the subject of many debates.
00:01:10Some superstitions claim that the dance of fairies would burn the ground,
00:01:14causing the growth of mushrooms.
00:01:17In southern India, between July and September 2001,
00:01:21people have witnessed one of the strangest meteorological phenomena in history.
00:01:26Red rain.
00:01:28The color was bright enough to stain clothes.
00:01:31There have also been rains of other colors, such as green, yellow, brown and even black.
00:01:37In the middle of the mushroom, a red rain began to fall periodically,
00:01:41and this over several weeks.
00:01:43Researchers have discovered that this rain was tinted with dust or algae,
00:01:48so avoid catching drops on your tongue.
00:01:51Scientists do not know how these algae could get there.
00:01:55This makes such events a little disturbing.
00:01:58People who live in the Esthalen valley in Norway
00:02:02often see white, yellow and red lights floating in the sky.
00:02:07They appear day and night.
00:02:10In the 1980s, they were observed 15 to 20 times in a single week.
00:02:15These lights can last a few seconds to more than an hour.
00:02:19They literally seem to swing in the air.
00:02:22Some scientists think that the reason for this phenomenon is due to ionized iron dust.
00:02:27Others say it is a combustion of sodium, oxygen and hydrogen.
00:02:32Many people claim that it is simply an airplane.
00:02:36Snowballs are one of the rarest meteorological curiosities to see,
00:02:41because it takes perfect weather conditions for them to form.
00:02:44In all snow-covered mountainous regions,
00:02:47wind, temperature, snow, ice and humidity must come together to create these strange snowballs.
00:02:54It all starts with a thin layer of wet snow on the ground.
00:02:57Under this layer must be ice or powder snow.
00:03:01A strong enough breeze can then take this snow off
00:03:04and make it roll down a hill like a snowball.
00:03:08These snowballs can be the size of a baseball or even a car tire.
00:03:12It all depends on the strength of the wind.
00:03:14These snowballs don't stay in place for long, so take a quick picture.
00:03:19Did you know that there is a place on Earth with its own ecosystem and its own atmosphere?
00:03:25The Movile cave, located in the southeast of Romania,
00:03:29has remained closed in total darkness for 5.5 million years.
00:03:34It was only when workers discovered it, while they were looking for a place to build, that it came to life.
00:03:40Scientists dug an opening in the cave
00:03:43and discovered that a totally viable and unique ecosystem was developing inside.
00:03:49By digging a path through the rock and through many tunnels,
00:03:53scientists discovered a lake of sulfurous water that smelled like rotten eggs.
00:03:58The air was filled with hydrogen sulfide
00:04:01and contained 100 times more carbon dioxide than the Earth's atmosphere.
00:04:05Needless to say, this air is toxic.
00:04:07But the craziest thing is that this cave housed an entire ecosystem,
00:04:12with 33 species that can't be found anywhere else on Earth.
00:04:16This cave gives us a glimpse of what could exist on other planets,
00:04:20with completely different atmospheres.
00:04:23The simple fact that it existed on Earth during all this time,
00:04:26without anyone knowing it, is pretty incredible, isn't it?
00:04:30Look at these trees.
00:04:32These are rubber figs.
00:04:34Their strong roots don't grow underground, but on the surface.
00:04:38With the help of tutors and special ties, people have learned to control the way their roots grow.
00:04:44Imagine that one of these trees is next to a pit where you want to build a bridge.
00:04:49You just have to direct its roots in the desired direction.
00:04:52Over time, the roots penetrate the ground and strengthen under the incessant winds.
00:04:57It takes about 15 years to build a bridge.
00:05:01Here is another amazing tree, called the tree of life.
00:05:04It grows in the Bahrain desert.
00:05:07This tree has been standing at the top of a sand dune for more than 400 years,
00:05:11in the middle of nowhere.
00:05:13It is extremely hot here, and there is no humidity.
00:05:16But despite everything, the tree has green leaves, and it continues to grow.
00:05:21So far, scientists have not yet understood where it gets its moisture and nutrients from.
00:05:27There are only oil wells all around.
00:05:29The inhabitants of the region believe that this tree is sacred.
00:05:32After all, it demonstrates the magic of life and the power of nature.
00:05:37Some experts are sure that everything comes from its roots.
00:05:40They are so deep that they can reach distant sources.
00:05:44Imagine that you have been driving all night.
00:05:47You haven't slept, and your mind starts to wander.
00:05:50You stop the car, and you go out to stretch your legs.
00:05:53You then look at the sky and see a magnificent sunrise.
00:05:57But wait, there are three suns in the sky?
00:06:01You rub your eyes, but there are still three shiny balls in the sky.
00:06:05No, you're not hallucinating.
00:06:07This is what is called a parallelepiped, or false sun.
00:06:11This occurs especially during strong frosts.
00:06:13Two small crystals of ice floating in the sky distort the light.
00:06:17That's why you think you see three bright spots in the sky instead of just one.
00:06:22This phenomenon is officially called a halo.
00:06:25Usually, it is often a circle around the sun.
00:06:29This phenomenon can also occur at night.
00:06:32Just look at a lamp to see a bright halo appear around it.
00:06:37Sometimes a halo can take a more fanciful shape.
00:06:40The more ice there is in the air, the more the light will be distorted.
00:06:44A bit like in a room full of mirrors.
00:06:47A halo can even take the shape of a human eye.
00:06:50Because of this phenomenon, a false dawn can occur.
00:06:54When you look at the horizon, the sun seems to rise.
00:06:57Then it begins to dissolve in the sky and it is night again.
00:07:01And it is only a minute later that the true sun finally appears.
00:07:06It is the same effect of curvature of the light that you saw with the three suns.
00:07:10Except that there, the light is curved vertically and not horizontally.
00:07:15And instead of the true sun, it is its reflection in the ice crystals that has appeared.
00:07:19But there is a sunrise showing three stars on the horizon.
00:07:23Not on Earth, but 340 light-years away.
00:07:27There is a stellar system in the center of which a star is hidden,
00:07:30almost twice as large as the sun,
00:07:33with two small stars orbiting around it.
00:07:36This strange system also has a planet.
00:07:39Sunrises and sunsets therefore occur with three stars.
00:07:43If you organize a hangover on a bench to watch a sunset,
00:07:47it should go very well.
00:07:50And since we are talking about the most disturbing natural phenomena,
00:07:53what about snow in a desert?
00:07:56During the winter of 2018, the inhabitants of the Sahara desert,
00:08:00one of the warmest and driest places on our planet,
00:08:03woke up discovering a thick layer of snow on the sand.
00:08:07In some places, this layer of snow reached a thickness of nearly 40 cm.
00:08:13Meteorologists have found an explanation for this phenomenon.
00:08:16They said that the cold air masses, combined with the last precipitation,
00:08:20had caused a snowfall instead of a simple rain.
00:08:23So what can we do in this case?
00:08:26Snow camels? We need one or two bosses!
00:08:31You are hiking in the wild,
00:08:34looking for a safe place to set up your camp.
00:08:37You only hear the leaves and branches cracking under your feet.
00:08:40Squirrels are running in a tree over there.
00:08:43But suddenly, something unexpected happens.
00:08:46You notice something strange in the distance.
00:08:49Between the trees, it looks like a kind of concrete structure.
00:08:52Weird.
00:08:54At this moment, you are already about thirty kilometers deep in the woods,
00:08:58and there is no city or village nearby.
00:09:01At least, as far as you know.
00:09:04So you decide to go out on the beaten path with your friends to get a closer look.
00:09:09But as you get closer, you realize that there is nothing else here.
00:09:13Hmm, what is this thing doing here?
00:09:16Literally in the middle of nowhere.
00:09:19And it doesn't even seem to lead to anything.
00:09:22You put on your Sherlock Holmes cap, and you start the investigation.
00:09:25Let's see.
00:09:27Maybe there was an old house or a manor here,
00:09:30which collapsed over the years, and the only thing left is this staircase.
00:09:34But strangely, after going around this strange structure,
00:09:38you realize that there is no trace of ruin, or even foundation.
00:09:43It's as if someone had cut a staircase from his house,
00:09:46like in a cake, and had placed it here for no reason.
00:09:50Okay.
00:09:52Your friends and you didn't really want to get closer.
00:09:55There is something wrong.
00:09:58The more you look at this structure, the more you think you feel a scary presence.
00:10:02Something tells you that you should probably leave the area,
00:10:06and as soon as possible.
00:10:08As strange as it may seem,
00:10:10these discoveries of incongruous staircases alone in the woods are surprisingly common.
00:10:16Some are made of wood, others of brick or stone.
00:10:19Some look old, while others seem to have been finished the day before.
00:10:24The only thing they all have in common is that they lead absolutely nowhere,
00:10:29and that they are all in very mysterious places.
00:10:32One of the most famous is in Chesterfield, in New Hampshire.
00:10:36A medieval-looking long staircase made of stone,
00:10:39with Roman vaults in the beautiful middle of the woods.
00:10:42It is thought that it was part of Madame Antoinette Chéry's castle,
00:10:46a Parisian singer of the crazy years.
00:10:48This castle would be almost a century old, and it was rediscovered in 1962.
00:10:54This time again, there was nothing but a staircase.
00:10:57Another old mysterious staircase would date from 9,000 years ago.
00:11:01It is located in a forest in Italy.
00:11:04It looks like a flight of stairs that leads to a tiny platform at the top.
00:11:08Why bother building it if it leads nowhere?
00:11:12Well, some experts think it could be some kind of tower with a ritual function,
00:11:17but these are only assumptions.
00:11:20There is a geoid anomaly in the Indian Ocean,
00:11:23simply known as the Indian Ocean Depression.
00:11:27It produces the largest deforming natural gravitational force in the world.
00:11:32The deposits of heavy minerals, the numerous pits in deep water,
00:11:36and the magma reservoirs present disrupt the magnetic field of this area.
00:11:41Earth's gravity changes in different parts of the planet.
00:11:45This allows researchers to study certain models
00:11:48and understand what happens under the surface.
00:11:51Higher gravity fields generally mean that the materials are denser below
00:11:56and vice versa.
00:11:58Some scientists think that the anomaly could be a crevice in the mantle of the planet
00:12:03that goes up to the Earth's crust.
00:12:06The island of Niaou seems to be enjoying all modern progress.
00:12:11There is no car because the inhabitants travel on foot or by bike.
00:12:15No wonder they look fit.
00:12:17They live without running water, without the Internet, and without shops.
00:12:21The only school on the island is powered by solar energy
00:12:25through a one-point generator.
00:12:27And what's great is that it's the only school in the state powered by the sun.
00:12:32An inhabitant of the island explains certain basic rules
00:12:35that permanent residents must follow.
00:12:38If they break them, they can be expelled.
00:12:41Now, not far from Bangkok, in the northeast of Thailand,
00:12:45there is a rock formation 75 million years old.
00:12:49These rocks look like three whales swimming together.
00:12:53This magnificent pattern, created by nature,
00:12:55is now known as the Three Whale Rock.
00:12:59Millions of years ago, this region was nothing but a desert.
00:13:03But the Earth was changing.
00:13:05Little by little, the ridge was separated by the movement of the tectonic plates and erosion.
00:13:10This is how these spectacular formations were created.
00:13:14If you decide to explore the course around the Three Whales,
00:13:17you will find waterfalls, a fauna and an abundant flora.
00:13:21Located on the peninsulas of the Yamal and the Guidane,
00:13:24these vast pits were discovered in 2014.
00:13:28They seem to be constantly evolving.
00:13:31The pits tend to widen,
00:13:33so that people spot them more and more often.
00:13:36Of course, the theories about how they appeared are not lacking.
00:13:40The hypotheses range from the impact of meteorites to the activity of ancient civilizations.
00:13:45But the most common explanation is that it was methane
00:13:48that reacted to water molecules after the planet's permafrost began to melt.
00:13:53This would have caused the explosion of methane bubbles through the ice.
00:13:57These craters could be thousands of years old, but no one is sure.
00:14:02You find yourself in the state of New Mexico, in the small town of Taos.
00:14:062% of the inhabitants hear a strange rumbling in the air every day.
00:14:11Some believe that this sound is linked in one way or another
00:14:14to the technologies used by the senders of other galaxies.
00:14:18There is also a legend that something sinister is happening in the city.
00:14:23It is rumoured that Taos is cursed.
00:14:26A bad spirit or some ghosts would punish people
00:14:29for a mistake made by their ancestors in the past.
00:14:32Scientists still cannot explain the nature of this sound.
00:14:36Another theory advances that it would be caused by the unusual acoustics of the place,
00:14:41while others believe that this rumbling is nothing more than a collective hallucination.
00:14:46Some could hear it for the simple reason that everyone talks about it,
00:14:50and our minds would generate the illusion of a sound that does not really exist.
00:14:54This sound is not the same for everyone.
00:14:57For some it is a serious vibration, for others it is rather a rumbling.
00:15:01But it is not the only place where you can hear these strange noises.
00:15:05It is called the hum, and people from all over the world claim to have heard it.
00:15:10Some inhabitants of a small village in Scotland describe it as a serious and thick rumbling.
00:15:16While the inhabitants of Florida would also have distinguished a similar noise.
00:15:20We do not know exactly when this phenomenon appeared,
00:15:23but the first time the press began to talk about it was in the 1970s in England.
00:15:29In addition, there are written traces of a mysterious rumbling dating back nearly 200 years.
00:15:35According to some estimates, only about 2% of the people on the planet can hear this famous hum.
00:15:41Maybe their ears pick up low-frequency waves, or maybe the reason is something else.
00:15:47A volcano in Indonesia spits out blue lava and produces electric blue and purple flames.
00:15:54This phenomenon occurs because this volcano has sulfur levels among the highest in the world.
00:15:59It also has a rather characteristic nauseating smell.
00:16:03But I'm wrong.
00:16:05When sulfuric gases interact with hot and burning air,
00:16:08they are ignited by the lava and become blue.
00:16:11You can also find the largest acid lake in the world inside this crater.
00:16:16Yes, this place is a real trap.
00:16:19It is not for nothing that rivers and underwater lakes are called salmon pools.
00:16:24The high salinity makes the water that is there denser than the surrounding sea water.
00:16:29That's why they sink to the bottom, forming rivers and lakes.
00:16:33They even have their own waves, and these waves can sometimes hit the shores.
00:16:38If you went down in a submarine, it would easily float to the surface of a salmon pool.
00:16:43But without submarines, swimming in such an environment would be too risky.
00:16:47It contains too much methane and toxic hydrogen sulfide.
00:16:51Yes, I would have a good time too, but have fun.
00:16:55The Crystal Cave in Mexico houses one of the most unique crystalline formations in the world.
00:17:01Thanks to the extremely rare conditions that reign in the cave,
00:17:05the crystals reach phenomenal sizes.
00:17:08The air is incredibly humid and the water contains tons of minerals
00:17:12that stimulate the growth of these giant milky whites.
00:17:16Some of them are longer than telephone poles.
00:17:19Cylindrical snowballs occur when a gust of wind starts to roll snow on a snowy slope,
00:17:26a bit like making a snowball.
00:17:28But if it were a ball, it would end up being too heavy for the wind to move it.
00:17:33Except that here, the center of the snowball is hollow.
00:17:36This happens because its inner layer is too thin and is carried by the wind as the snowball is formed.
00:17:42And that makes the object lighter than a snowball.
00:17:45That's also why it rolls further.
00:17:48Unfortunately, snowballs are rare because they need very precise conditions to appear.
00:17:54The Danakil Depression in Ethiopia is probably one of the weirdest places you'll ever see.
00:18:00It is made up of hot springs of neon colors, lava pools and vast expanses of salt.
00:18:06You have to be particularly careful there.
00:18:09Toxic gases swirl above hydrothermal phenomena
00:18:12and many pools are extremely acidic.
00:18:15So don't go swimming there. Wait at least 30 minutes after lunch.
00:18:20No, I'm kidding.
00:18:22And finally, there is nothing mysterious about these 28,000 rubber ducks found in the seas in 1992.
00:18:29A boat carrying toys for the bath lost its cargo in the ocean
00:18:33as it traveled from Hong Kong to the United States.
00:18:36Some of these ducks still float there several decades later.
00:18:40They have been spotted in South America, Alaska, Hawaii and even Australia.
00:18:45And they still make the bath time so fun.
00:18:48Oh, well done, little ducks.
00:18:51You feel a grunt coming from below.
00:18:54No, it's not your belly. It's a serious and disturbing sound.
00:18:57You look up and see strange lights suspended above the ground.
00:19:01They look like sparkling light balls floating high in the sky.
00:19:05Your throat becomes dry and you swallow.
00:19:08This is what we call lightning.
00:19:11This phenomenon is misunderstood, but witnesses claim to have observed it in different ways.
00:19:16It can appear in the form of light balls, lightning,
00:19:20snakes and a constant glow in the sky.
00:19:23Shortly after, a strong earthquake occurs.
00:19:26Scientists do not know why these lights appear.
00:19:29And they don't always appear.
00:19:31Some think it's a reaction of underground gases released into the atmosphere.
00:19:36Now, an earthquake begins to occur.
00:19:39But, fortunately for you, it is not as strong as you expected.
00:19:43The ground trembles, but you still manage to keep your balance.
00:19:46The tremor stops as abruptly as it started and you go home on foot.
00:19:51On the way back, you see a flash and hear a whip crack.
00:19:55The lightning struck an isolated tree near where you were.
00:19:59The tree caught fire and a column of flames rises to the sky.
00:20:03Still no rain, and the column rises higher and higher.
00:20:07Have you heard of a phenomenon called fire tornado?
00:20:11It occurs when the wind is caught in a circle near the ground
00:20:14because of the difference in air pressure.
00:20:17These mini-tornadoes are generally easy to notice.
00:20:20Small gravel, dust, sand and leaves rise in the air
00:20:24and begin to fly in a fast circle.
00:20:27If a source of fire is nearby,
00:20:30the black cloud can suck it in and shake it like a whistle.
00:20:34The flames roll up, rise higher and higher
00:20:37and end up creating a flaming tower.
00:20:40Fortunately, fire tornadoes have a very short life span
00:20:44and generally do not cause much damage.
00:20:46Don't try to hide from the storm under that tree.
00:20:49You can find this unusual plant in Florida and in some parts of the Caribbean outskirts.
00:20:54Externally, it doesn't seem particularly special.
00:20:57It has a gray trunk, green leaves and fruits that look like small apples.
00:21:01What you have to remember is to never pick these apples
00:21:04and never stay near the tree, especially if it rains.
00:21:08Here is the manzanilla, which is considered the most dangerous tree in the world.
00:21:13Its trunk, its bark, its branches and its fruits contain a toxic juice.
00:21:18A single drop of this corrosive liquid can damage your skin.
00:21:23The tree can secrete this juice and if you touch it accidentally,
00:21:27you risk burning your hand.
00:21:29When it rains, drops of water fall on the tree and mix with the poison.
00:21:34The water can also bounce off the bark and end up on your skin.
00:21:38That's why you shouldn't stay near either.
00:21:41There is almost no other shrub or mushroom that grows nearby.
00:21:45Animals avoid these trees and people don't cut them and don't pick their fruits.
00:21:49You can't make a fire with these branches either.
00:21:52The burning wood releases a toxic smoke that can damage your eyes.
00:21:56Locals know this tree well, but tourists and travelers can get hurt accidentally.
00:22:01That's why most manzanilla trees are painted or have a warning sign.
00:22:07In the west of Venezuela, residents living near the Catatumbo River
00:22:12are probably not afraid of lightning because they see them almost every night.
00:22:16This phenomenon starts around 7 p.m. and continues until dawn.
00:22:21The eternal storm of Catatumbo stopped only once during a few months,
00:22:25from January to March 2010.
00:22:27It was probably due to drought or maybe the charge was exhausted.
00:22:31In 1991, a scientist suggested that the phenomenon occurred
00:22:36because of the meeting of cold and hot air currents in the region.
00:22:40According to another theory, lightning could be due to the presence of uranium in the sea rock.
00:22:45All lightning does not occur inside the clouds.
00:22:48There is a rare phenomenon called volcanic storm.
00:22:51Lightning occurs above a volcano, the most famous of which is in Japan.
00:22:56It erupts almost every day and spits out black clouds very high in the air.
00:23:01So we have super scary volcanic clouds and lightning with that.
00:23:05Ordinary lightning occurs during a storm when ice crystals collide with each other.
00:23:11During a volcanic storm, ashes collide,
00:23:14creating friction and sparks that illuminate the sky.
00:23:17In the hottest and driest place on Earth, the Danakil Desert in East Africa,
00:23:23temperatures often exceed 50 ° C.
00:23:26This unusual landscape has many active volcanoes and geysers
00:23:31that spit out toxic gases such as chlorine and sulfur.
00:23:34The waters of a sparkling glass, an electric blue and a bright yellow
00:23:38are all rain and sea waters heated by magma.
00:23:42A false step here can be fatal.
00:23:46The following phenomenon occurred in June 2009.
00:23:49Residents of certain regions of Japan left their homes after a heavy downpour
00:23:53to discover fish, frogs and tetras everywhere.
00:23:57The fields, roads, meadows and roofs were full of these aquatic creatures.
00:24:02A man was shocked to see 13 carps on and around his truck.
00:24:06Apparently, he stopped to count them.
00:24:09No one knows for sure where this strange rain came from.
00:24:12But the most popular theory states that a powerful marine trombe
00:24:15picked up all these creatures.
00:24:17She then transported them into the high atmosphere
00:24:20and released the animals on the farmland and on the populations
00:24:23without caution that were below.
00:24:25And now, welcome to Lake Abraham in Canada.
00:24:28It is completely frozen.
00:24:30You walk on the transparent ice and you look at what is below.
00:24:33No fish, just mysterious frozen bubbles.
00:24:37They look like small clouds frozen in the ice
00:24:39or like jellyfish that forgot to take their winter coats.
00:24:42There are thousands of these small bubbles that are actually made up of methane.
00:24:46But don't try to dig a hole in the ice to touch them.
00:24:49Methane is very flammable.
00:24:51It is created by bacteria that eat leaves, grass, insects
00:24:55or any other organic substance found in the lake.
00:24:59When methane touches frozen water,
00:25:01it turns into tens of thousands of small frozen bubbles.
00:25:05When the ice melts, they burst and crack.
00:25:08We find similar lakes near certain shores of the Arctic Ocean.
00:25:12There, the size of the bubbles can reach several times the size of a sea gull.
00:25:17Magnificent, but not without danger.
00:25:21The following phenomenon occurs in Indonesia on Java Island.
00:25:25You arrive in front of a majestic volcano,
00:25:28invaded by grass and trees.
00:25:30The volcano seems asleep, but the smoke escapes.
00:25:35You climb to the top.
00:25:36Exhausted, tired, sweaty, you are ready to cool off.
00:25:40Well done, you managed to reach the top.
00:25:43You look into the mouth of the volcano.
00:25:45Hmm, no boiling lava, just a magnificent turquoise and luminous lake.
00:25:50It looks like an oasis.
00:25:51It's the perfect time for a refreshing swim.
00:25:54You run and prepare to jump.
00:25:56But it's not water, it's acid.
00:25:58Sulfuric gases infiltrate the lake from below the volcano.
00:26:03The lake itself is full of metals.
00:26:05When the gases touch them, they form this beautiful turquoise water,
00:26:09or rather this beautiful acid.
00:26:11It is better to return to the nearest village,
00:26:13rest and return in the evening when it is cooler.
00:26:16In the darkness, the lake seems to shine.
00:26:19Just above it, you see small luminous clouds exploding.
00:26:23Sulfuric gases come out of the lake,
00:26:25combine with the air and light up a bright blue.
00:26:28But don't get too close.
00:26:31The sea takes on a sinister red hue,
00:26:33and no living being can survive it.
00:26:36It must be black magic.
00:26:38In fact, these are tiny algae that spread uncontrollably
00:26:42and give birth to this specific hue called the red tide.
00:26:46They contain toxins that destroy marine mammals,
00:26:49birds and turtles, as well as creatures that feed on them.
00:26:52For humans, the contact is solved by respiratory problems or intoxication.
00:26:58Sometimes, huge ships sink in the middle of the sea for no apparent reason.
00:27:03In reality, this is often due to the pockets of bubbles
00:27:06that underwater volcanoes produce even while they sleep.
00:27:09These magma plants are hidden under 2,600 meters of water.
00:27:13When they wake up, they act like terrestrial volcanoes
00:27:17and can cause destructive tsunamis.
00:27:20This tree looks like a bottle.
00:27:22No wonder it's called the bottle tree.
00:27:25It grows in Namibia and attracts many tourists.
00:27:28But don't get too close to it,
00:27:30because it's one of the most dangerous on Earth.
00:27:33A milky juice flows inside the trunk.
00:27:36It's highly toxic to the human body.
00:27:38But the good thing is that these trees have beautiful pink and white leaves with a red heart.
00:27:43In Western Australia, there is a tree that was once used as a prison.
00:27:48A cell for criminals has long existed inside the Boab prison tree.
00:27:53People were usually kept there temporarily, just for one night.
00:27:56After that, they were taken to their final destination.
00:28:00The prison was built more than 1,500 years ago
00:28:03and has been perfectly preserved to this day.
00:28:06Tourists who visit this place can take a look inside.
00:28:11The Kawah Ijen volcano, located in Indonesia,
00:28:14is not an ordinary lava mountain.
00:28:16Instead of producing black smoke and red lava,
00:28:19as most volcanoes do,
00:28:21this eccentric mountain releases a blue flame
00:28:24and electric blue lava.
00:28:26This phenomenon occurs because the volcano contains sulfur levels
00:28:29among the highest in the world.
00:28:31And when sulfuric gases interact with the burning air
00:28:34and are ignited by the lava,
00:28:36they begin to turn blue.
00:28:38Unfortunately, you can only see this enrapturing spectacle at night.
00:28:41But you can feel it all day long.
00:28:44By the way, the largest lake in the world is also inside this crater.
00:28:50The Dead Sea has a high concentration of salt and minerals
00:28:53compared to other seas,
00:28:55even if technically it is a lake.
00:28:57It is almost impossible to swim there,
00:28:59but people go there to enjoy natural chemical substances for the body.
00:29:03Floating on the surface is an excellent way to relax.
00:29:07This ancient water stretch has received its name
00:29:10because being 9.6 times saltier than the oceans,
00:29:13no macroscopic organism can live there.
00:29:16There are only a few bacteria and mushrooms that like salt.
00:29:19It is also the lowest place on Earth,
00:29:22at 427 meters below sea level.
00:29:25There is an underground crystal cave in Mexico
00:29:28and it looks like an interstellar world.
00:29:31It is located about 305 meters below the surface
00:29:34and each tip measures up to 11 meters long
00:29:37and weighs up to 55 tons.
00:29:40These crystals are among the largest in the world.
00:29:43The Luskentier beach is an endless stretch of white sand dunes and azure water.
00:29:49But don't be fooled by this tropical aspect,
00:29:52it is located in Scotland.
00:29:54That's why it looks like this only in May and June.
00:29:57In December, the place receives on average only one hour of sunshine per day,
00:30:01which makes it just as spectacular, but in a monochrome style.
00:30:06The Georgia Guidestones are a giant stone structure arranged in stars.
00:30:11They contain inscriptions in eight languages,
00:30:14including Hindi, Chinese and Swahili.
00:30:17They also present an astronomical calendar,
00:30:20completed in 1980 and erected for centuries.
00:30:23Nobody knows who built it or why.
00:30:27In the center of California is the Sequoia National Park,
00:30:31where you can walk in the Giant Forest.
00:30:34It has existed for thousands of years.
00:30:36More than 8,000 colossal sequoias reign on Earth
00:30:39and ten of them are among the world's largest living plants.
00:30:43General Sherman is estimated to be nearly 2,700 years old
00:30:47and is considered the world's largest living tree in terms of volume.
00:30:53The famous Stone Heads of Easter Island have existed for hundreds of years.
00:30:57Nobody knows exactly why they were built.
00:31:00Some scientists believe that the local population
00:31:03believed that the statues would make the soil more fertile.
00:31:06The analysis of the soil has shown that the heads have done their job well.
00:31:10It is the best place on the island for agriculture.
00:31:13The chemical composition of the ancient hot springs of Pamukkale, in Turkey,
00:31:17gives a magical look to the water that spills over the edge.
00:31:21They are beneficial for purifying not only the body, but also the mind.
00:31:25At the bottom of Saudi Arabia is a perfectly truncated rock in its center,
00:31:30with its two halves placed in parallel.
00:31:33What makes Al-Nasra so unique is that it was not made artificially,
00:31:37but as a result of the work of nature over the centuries.
00:31:41This glacier can give the impression that someone dropped tons of red paint
00:31:45in the middle of the Antarctic, but it is actually a natural color.
00:31:49The blood drops are the result of extremely salty water mixed with iron oxide,
00:31:54which gives this sinister atmosphere in the middle of nowhere.
00:31:58In May 2018, the inhabitants of New England were able to observe
00:32:02one of the scariest and most dangerous phenomena ever.
00:32:06A tornado with a very long trajectory.
00:32:09The frightening natural phenomenon began its race not far from Charleston,
00:32:13in New Hampshire, and went to the city of Webster, in the county of Merrimack.
00:32:18It took 33 minutes for the tornado to travel 58 km,
00:32:22and become the third on the list of tornadoes with the longest trajectory in New England.
00:32:28In the Philippines, you can swim in the most crystalline waters in the world
00:32:32and discover an underwater world under your feet in the province of Palawan.
00:32:36The city of Coron has white sand beaches with many small boats
00:32:41sailing in the many amazing landscapes.
00:32:44Tristan da Cunha is a small volcanic archipelago in the Atlantic,
00:32:48whose biggest neighbors are the cities of Buenos Aires in Argentina
00:32:52and the Cape in South Africa.
00:32:54It takes 7 days by boat to get to this unique place.
00:32:58If you want to escape from the rest of the world by staying among the 280 inhabitants,
00:33:02you will have the impression of being far from everything.
00:33:05During the first week of January 2018,
00:33:08an exceptionally cold weather,
00:33:10seething in the northeast of the United States,
00:33:12froze the Atlantic Ocean to North Falmouth in Massachusetts.
00:33:16The ocean was so frozen that people could walk on the waves.
00:33:20It's obviously something you don't see every day.
00:33:24The red sand is what makes this beach so unique
00:33:27and the reason why tourists flock to Tianjin in China.
00:33:30A red plant called Suaida Salsa lives in the salt water.
00:33:35The whole beach is covered in red
00:33:37and only the upper layer of the sea is visible.
00:33:40If there is one thing that seems to challenge gravity,
00:33:43it is the stone of Tabasco in Argentina.
00:33:45The huge 300-tonne rock
00:33:47stands precariously on the edge of a cliff
00:33:50and swings a little from one side to the other under the effect of the wind.
00:33:53People even checked it by putting glass bottles under one of its edges.
00:33:57They exploded with a movement of the rock.
00:34:00Unfortunately, today you can no longer see this wonder of nature
00:34:04as it was a century ago.
00:34:06In 1912, the rock suddenly fell from the perch that occupied it
00:34:10for hundreds of years.
00:34:12The inhabitants of the neighboring city of Tandil
00:34:14were so saddened by this event
00:34:16that 95 years later, in 2007,
00:34:19they decided to restore the stone.
00:34:21They made a plastic replica of it
00:34:23and placed it in the same place and in the same position.
00:34:27So even today, passing by Tandil,
00:34:30you can see its famous rock in balance,
00:34:32even if it is more of a symbol
00:34:34since it no longer swings and weighs only 9 tonnes,
00:34:37but it is nevertheless immediately recognizable.
00:34:40Socotra is an alien island
00:34:43located off the coast of Yemen,
00:34:45in the Indian Ocean,
00:34:47with one of the most unique trees in the world.
00:34:49It is called the dragon tree
00:34:51and can only be found on this amazing island.
00:34:53In 2008, it was recognized as a World Heritage Site.
00:34:57If you ever see a compact and burning air column,
00:35:00don't panic.
00:35:02This is not the end of the world.
00:35:04The frightening combination of the sound of whirlwinds and burning embers
00:35:07means that you are on the path of a fire tornado.
00:35:10This dangerous phenomenon occurs mainly during forest fires.
00:35:14Fires create a large area of very hot air just above the ground.
00:35:18When this burning air mixes with the fresher air,
00:35:21located higher,
00:35:22it results in a whirlwind that burns burning debris and flames.
00:35:25The most powerful fire tornadoes
00:35:27can spread over hundreds of meters in the sky.
00:35:31The Mystery House in Gold Hill, Oregon,
00:35:34amazes its visitors with effects defying gravity.
00:35:37You can't stand straight.
00:35:39You always lean on one side
00:35:41and you have to hold on to something to keep your balance.
00:35:44The balls roll up
00:35:46and there is a broom that remains perfectly still
00:35:49or that you put it down,
00:35:50unlike almost everything else in the cabin.
00:35:53The local Amerindian tribes called this place
00:35:56the Forbidden Land,
00:35:57even before the house was built.
00:35:59And they avoided getting close to it.
00:36:02But the owners of the cabin decided to make it an attraction
00:36:05and they succeeded.
00:36:07They created an atmosphere of mystery around the place
00:36:10and spread the news in the newspapers
00:36:12and later on the Internet.
00:36:14And here is a perfect anomaly born.
00:36:17In fact, it is nothing more than a curiosity,
00:36:20an optical illusion created by man
00:36:22that deceives your eyes and your other senses.
00:36:25If you travel to the Philippines, Indonesia or Papua New Guinea,
00:36:29you will have the chance to see some of the most unusual
00:36:32and happiest trees in the world.
00:36:34The trunk of the Eucalyptus rainbow
00:36:36seems to have been painted in orange, green, red, purple,
00:36:40yellow, brown and blue.
00:36:42Some trees are so bright
00:36:44that they seem artificial.
00:36:46The Eucalyptus rainbow
00:36:48regularly loses stripes,
00:36:50which reveals a shiny green layer below.
00:36:52A little later,
00:36:54this green layer gradually changes color
00:36:56and as the rainbow occurs at a different time
00:36:58in different parts of the trunk,
00:37:00the tree begins to have a multicolored
00:37:02and very attractive appearance.
00:37:04Yemen houses the oldest skyscrapers
00:37:07and the oldest metropolis in the world.
00:37:09The ancient city of Shibam
00:37:11is considered the Manhattan of the desert
00:37:13because of the collection of earthen buildings
00:37:15coming out of the desert floor.
00:37:17It served as a stage for caravans
00:37:19during Antiquity.
00:37:21On the way to the Middle East,
00:37:23there is a great desert
00:37:25and at night,
00:37:27the darkness is complete,
00:37:29except at a very specific place.
00:37:31It is a large circle
00:37:33shining with a bright orange light,
00:37:35the Darvaza crater.
00:37:37It is a giant gas burner.
00:37:39Years ago, geologists found gas here
00:37:41and they began to exploit it.
00:37:43But when they dug,
00:37:45they came across an underground cavity.
00:37:47The cavity collapsed
00:37:49and formed a crater.
00:37:51It is as wide as half a football field
00:37:53and its depth is equivalent
00:37:55to the height of a five-story building.
00:37:57Gas began to escape
00:37:59from the cracks of the crater
00:38:01and as animals often peed near this place,
00:38:03geologists decided to set fire
00:38:05to these gas flows
00:38:07to exhaust the source.
00:38:09They thought the fire would go out in a day or two.
00:38:11But if you visit the place today,
00:38:13you will find that this portal
00:38:15to the underground world is still burning
00:38:17and it has lasted for almost 50 years.
00:38:19In 2013,
00:38:21a man went down to the bottom of the crater
00:38:23on fire for the first time.
00:38:25He collected many samples
00:38:27and scientists found bacteria
00:38:29that can not be found anywhere else on Earth.
00:38:31It seems quite comfortable
00:38:33at the bottom of this eternal blaze.
00:38:35In 2009,
00:38:37in the city of L'Aquila in Italy,
00:38:39a man saw flickering lights
00:38:41dancing above a paved street.
00:38:43He immediately knew what to do
00:38:45and moved his family to a safer place.
00:38:47A few seconds later,
00:38:49a huge earthquake of magnitude 8.3
00:38:51struck the region.
00:38:53His knowledge of strange lights
00:38:55saved his life
00:38:57and that of his family.
00:38:59So what are these mysterious warnings?
00:39:01For centuries,
00:39:03people have interpreted lights
00:39:05as something from another world.
00:39:07The scientific community
00:39:09did not take them seriously
00:39:11and took them as an optical illusion
00:39:13or pure imagination.
00:39:15But with the arrival of surveillance cameras
00:39:17and smartphones,
00:39:19the amount of evidence
00:39:21has increased enormously.
00:39:23The link was now obvious.
00:39:25Lights appeared
00:39:27and an earthquake occurred.
00:39:29Experts have finally begun
00:39:31to take things seriously
00:39:33and to dig to discover the truth.
00:39:35But after years of research,
00:39:37geologists are still not totally sure
00:39:39of the source of the lights.
00:39:41However, they have identified five types.
00:39:43Bright lightning that illuminates the sky,
00:39:45similar to thunderstorms
00:39:47or a very powerful flash of a camera,
00:39:49rays in the sky
00:39:51that can look like luminous columns,
00:39:53flames of different sizes
00:39:55that cross the ground,
00:39:57diffuse glow above the mountains,
00:39:59and light balls
00:40:01that move slowly
00:40:03and can be misinterpreted
00:40:05as lightning bolts.
00:40:07Another atmospheric phenomenon
00:40:09just as little understood,
00:40:11these balls can float and explode,
00:40:13leaving behind a smell of sulfur.
00:40:15But unlike lightning bolts,
00:40:17these balls seem harmless
00:40:19if you don't take into account
00:40:21what they announce.
00:40:23In any case, experts still don't know
00:40:25how all these types of lights
00:40:27are related to earthquakes.
00:40:29Lights don't only appear
00:40:31before an earthquake strikes.
00:40:33Some have been reported during
00:40:35and after earthquakes.
00:40:37They can also appear with other phenomena,
00:40:39such as meteorite falls,
00:40:41volcanic eruptions, or aurora borealis.
00:40:43For now, scientists can only
00:40:45propose theories to explain
00:40:47the inexplicable.
00:40:49One of the most recent claims
00:40:51that lights are due to broken electric lines
00:40:53during an earthquake.
00:40:55But this theory doesn't explain
00:40:57how the phenomenon was reported
00:40:59hundreds or even thousands of years ago.
00:41:01As in this ancient Chinese tale,
00:41:03according to which clouds
00:41:05resembling dragons appeared in the sky
00:41:07to warn of an upcoming earthquake.
00:41:09Or as in this ancient Roman historian
00:41:11who reported that enormous lights
00:41:13resembling flames
00:41:15exploded just before
00:41:17an enormous earthquake occurred.
00:41:19The theory of electric lines
00:41:21was therefore quickly dismissed.
00:41:23Another theory suggested
00:41:25that they were gases escaping.
00:41:27During an earthquake,
00:41:29underground rocks expand
00:41:31and retract under pressure and heat.
00:41:33This opens and closes
00:41:35small spaces between them.
00:41:37Different gases would make
00:41:39their way through these new openings.
00:41:41Radon, for example,
00:41:43can be released during a seismic activity.
00:41:45It can ionize the air,
00:41:47making it electrically charged.
00:41:49But radon is not enough
00:41:51to create sparkles of light.
00:41:53This theory is tempting,
00:41:55but it must also be dismissed.
00:41:57One of the most accepted theories
00:41:59is that it could come from
00:42:01electricity rising from the ground.
00:42:03When underground rocks,
00:42:05those formed from magma
00:42:07in the depths of the Earth,
00:42:09are under pressure,
00:42:11they release ionized oxygen
00:42:13or are charged electrically.
00:42:15They cross the surface
00:42:17and rise in the atmosphere
00:42:19creating a localized electric field.
00:42:21This can produce short flashes
00:42:23of visible light.
00:42:25Some are not even that fast
00:42:27and can last several minutes.
00:42:29Now, imagine that you drove
00:42:31for hours at night.
00:42:33You stop and go out
00:42:35to stretch your legs.
00:42:37Then you look up
00:42:39and see a beautiful sunrise.
00:42:41But wait,
00:42:43there are three suns in the sky.
00:42:45You rub your eyes,
00:42:47but there are still
00:42:49three bright stars in the sky.
00:42:51No, our sun has not been
00:42:53torn into three pieces.
00:42:55Nor has it been visited
00:42:57by two other stars.
00:42:59This is what we call a parallelepiped.
00:43:01This phenomenon is also
00:43:03called a halo.
00:43:05Usually, it is simply
00:43:07a circle around the sun.
00:43:09It is even possible to see
00:43:11a halo at night.
00:43:13Just look at a lamp
00:43:15and you will see
00:43:17a luminous circle around it.
00:43:19Sometimes a halo
00:43:21can take a more
00:43:23fanciful shape.
00:43:25If there is a lot of ice in the air,
00:43:27the light is even more distorted.
00:43:29Just like in a room
00:43:31with a dozen mirrors.
00:43:33Then the halo can take the shape
00:43:35of a human eye.
00:43:37Because of this phenomenon,
00:43:39a false dawn can also occur.
00:43:41As you look at the horizon,
00:43:43the dawn points
00:43:45and the edge of the sun appears.
00:43:47A little more and ...
00:43:49the sun begins to dissolve
00:43:51in the sky.
00:43:53After a few minutes,
00:43:55it is night again.
00:43:57The real sun shows its face.
00:43:59It is the same effect of curvature
00:44:01of the light that you saw before
00:44:03with the three suns.
00:44:05Only now, the light is curved
00:44:07vertically and not horizontally.
00:44:09And instead of the real sun,
00:44:11it is its reflection in ice crystals
00:44:13in the sky that has appeared.
00:44:15Let's continue. This cloud looks
00:44:17like a dinosaur.
00:44:19And this one looks like a cat.
00:44:21And this one ... Wow!
00:44:23It looks like these clouds are falling.
00:44:25No, it's just a mammoth-type cloud.
00:44:27Their shape really gives them
00:44:29the look of pieces of clouds
00:44:31about to fall to the ground.
00:44:33It shouldn't happen,
00:44:35but you'd better start
00:44:37looking for shelter.
00:44:39Such clouds are the sign
00:44:41of the arrival of a violent storm.
00:44:43You need a lot of moist air
00:44:45with ice crystals at an altitude
00:44:47and dry air in the low layers
00:44:49to create such clouds.
00:44:51Then, vertical air currents
00:44:53make the clouds
00:44:55take the shape of a human brain.
00:44:57This giant cloud looks like
00:44:59a dome that will cover
00:45:01an entire city.
00:45:03And that's exactly what's going on.
00:45:05A huge cloud covers a vast area
00:45:07and then pours abundant rain.
00:45:09Sometimes the front of such a cloud
00:45:11takes a strange shape,
00:45:13as in these photos.
00:45:15It looks like spaghetti or giant glasses.
00:45:17This phenomenon is observed
00:45:19especially in Australia
00:45:21called Morning Glory.
00:45:23It occurs when a strong wind
00:45:25twists parts of the cloud
00:45:27on both sides,
00:45:29and then the huge cloud mass
00:45:31splits into thick bands.
00:45:33Sometimes you can see in the sky
00:45:35a cloud made up of thousands of birds.
00:45:37They move quickly and change shape.
00:45:39They become more transparent,
00:45:41then denser and darker again.
00:45:43The birds seem to be participating
00:45:45in a kind of dance,
00:45:47but they're not doing it
00:45:49to protect themselves.
00:45:51When birds gather in such a cloud,
00:45:53they intimidate prey birds.
00:45:55An eagle or a hawk
00:45:57would have a hard time choosing
00:45:59a single target among the infinite number of birds.
00:46:01In addition, they move quickly,
00:46:03covering each other.
00:46:05Fishes use each other
00:46:07in the same way.
00:46:09Such a cloud can frighten
00:46:11a hungry predator.
00:46:13Take sunglasses for the following.
00:46:15This phenomenon lasts about 40 minutes
00:46:17and these clouds are the same
00:46:19as those that can cause the appearance
00:46:21of a frightening ring
00:46:23around the moon at night.
00:46:25Nature sends precursor signs
00:46:27of disasters in many different ways.
00:46:29J-shaped trees can mean
00:46:31that a landslide is preparing.
00:46:33As the ground moves slowly,
00:46:35trees take this very photogenic shape.
00:46:37In this case,
00:46:39try to find a flat area
00:46:41and avoid approaching trees,
00:46:43except if you have superhuman strength.
00:46:45Another mystical phenomenon
00:46:47can be observed in the desert,
00:46:49a sandstorm.
00:46:51When the wind carries a lot of sand
00:46:53along a canyon,
00:46:55it starts to fall.
00:46:57Now, amplify this effect 100 times
00:46:59and you get a sandstorm,
00:47:01like the one we can observe
00:47:03in Saudi Arabia.
00:47:05It's like Niagara Falls,
00:47:07except there's no water.
00:47:09Locals say this phenomenon
00:47:11comes from an imminent sandstorm.
00:47:13The liquid sky, or five-colored river,
00:47:15is located at Macarena,
00:47:17in Colombia.
00:47:19There, you can admire the red,
00:47:21yellow, green and purple waters
00:47:23of the river.
00:47:25And the color depends on the light conditions.
00:47:27Macarena clavigera,
00:47:29an aquatic plant,
00:47:31is responsible for this magnificent natural phenomenon.
00:47:33It hangs on the rock
00:47:35in the river bed
00:47:37and gives it this particular hue.
00:47:39The fact that the water is so clear
00:47:41also contributes to the phenomenon,
00:47:43since there are almost no nutrients
00:47:45or other micro-particles.
00:47:47The hottest place on Earth
00:47:49and the lowest point in North America
00:47:51is called the Valley of Death.
00:47:53If you go there one day,
00:47:55you might be surprised
00:47:57and think you're surrounded by ice.
00:47:59But it's not frozen water.
00:48:01It's salt.
00:48:03When the rain mixes with the minerals,
00:48:05it dissolves the outer layer of the rocks
00:48:07surrounding the area.
00:48:09This surrealist landscape
00:48:11becomes even more appealing
00:48:13when you see the dunes.
00:48:15They are only part of the Valley of Death,
00:48:17but are part of the most memorable panoramas.
00:48:19Some rise up to more than 200 meters high.
00:48:21If you ever find yourself
00:48:23at the top of the dunes,
00:48:25you might have the chance to discover
00:48:27one of the strangest wonders of the desert.
00:48:29The singing sand.
00:48:31It turns out that this phenomenon
00:48:33has not yet been fully understood.
00:48:35An explanation could be that the sand
00:48:37vibrates because of the friction
00:48:39between its grains.
00:48:41When you listen to it,
00:48:43you get the impression
00:48:45that a plane is flying in the distance.
00:48:47It's one of the rare places on Earth
00:48:49with the Namib Desert in South Africa
00:48:51where the Hawaiian sand
00:48:53makes such a loud noise
00:48:55that it can be heard by visitors.
00:48:57Earthquake lights can appear
00:48:59before or immediately after an earthquake.
00:49:01These white and blue lights
00:49:03usually only last a few seconds.
00:49:05But you can also sometimes see
00:49:07some longer, but very rare,
00:49:09that last 10 minutes.
00:49:11It is difficult to study this natural phenomenon
00:49:13because earthquake lights
00:49:15seem to appear at different distances
00:49:17from the epicenter of the earthquake.
00:49:19Sometimes directly above it,
00:49:21sometimes up to 400 kilometers away.
00:49:23What we know is that they only occur
00:49:25when the earthquake is strong enough,
00:49:27a value of 5 or more on the Richter scale.
00:49:29This could have a link
00:49:31with the release of ionized oxygen
00:49:33by the rupture of certain types of stones.
00:49:35The next phenomenon
00:49:37is called Easter light
00:49:39and occurs only on a small plot of land
00:49:41in Norway.
00:49:43They were first noticed in the 1930s.
00:49:45They seem to float above the valley
00:49:47or move at high speed,
00:49:49lasting only a few seconds.
00:49:51They are multicolored spots,
00:49:53yellow, white and red.
00:49:55On average, people see them
00:49:57between 10 and 20 times a year.
00:49:59The rare element called scandium
00:50:01is responsible for this strange phenomenon.
00:50:03Easter light
00:50:05could be the effect of its combustion
00:50:07with its deposits of hydrogen, oxygen
00:50:09and sodium.
00:50:11The next solar phenomenon
00:50:13gives the impression that vertical objects
00:50:15have no shadow in broad daylight.
00:50:17For this to happen,
00:50:19the sun must be at an angle of 90 degrees
00:50:21directly above our planet.
00:50:23It is called the Hainanoon,
00:50:25which translates as cruel sun in Hawaiian.
00:50:27To see it, you will have to go to a latitude
00:50:29in Nicaragua and in some parts of the Philippines.
00:50:31In one of these places,
00:50:33you will be able to enjoy
00:50:35this phenomenon of Hainanoon
00:50:37up to twice a year.
00:50:39Twice a month,
00:50:41you can see a clear reflection of the sky
00:50:43in the waters of the beach
00:50:45of Sasaran in Kuala Lumpur.
00:50:47It is because the tides are the lowest
00:50:49during the days of a new moon
00:50:51and a full moon.
00:50:53A thin layer of water covers the smooth sand
00:50:55and gives it the appearance of a mirror.
00:50:57It is ideal for taking pictures
00:50:59that almost seem to have been photoshopped.
00:51:01The Namibian desert in Namibia
00:51:03looks like no other.
00:51:05Strange circular spots spread
00:51:07all over the Namibia
00:51:09on an area of about 4,000 square kilometers.
00:51:11They are also nicknamed
00:51:13the circle of fairies
00:51:15and the mysterious phenomenon
00:51:17that causes them was discovered
00:51:19a few years ago in 2017.
00:51:21To begin with,
00:51:23as there is little water in the desert,
00:51:25the tides disappear.
00:51:27This is where the tides come from.
00:51:29But then, these tides are invaded
00:51:31by the termites,
00:51:33so that nothing can grow in the same area.
00:51:35The slopes of the mountain
00:51:37of the National Geological Park
00:51:39of Zhangjie in Anjia, China
00:51:41are known for its thick straight-line
00:51:43rainbow splashes.
00:51:45The rocks here are also smooth,
00:51:47steep and several hundred meters high.
00:51:49These colors are due to deposits
00:51:51of chalk and other minerals
00:51:53The wind and other weather conditions
00:51:55have sculpted these amazing shapes
00:51:57over time, giving them colors,
00:51:59sizes and various motifs.
00:52:01To preserve the place,
00:52:03tourists are not allowed
00:52:05to climb directly on the rocks.
00:52:07Under the frozen waters
00:52:09of Lake Abraham in Alberta,
00:52:11you will be able to spot
00:52:13strange objects under the ice
00:52:15that look like frozen jellyfish.
00:52:17These frightening formations
00:52:19are only frozen methane bubbles,
00:52:21which are formed when leaves
00:52:23or grass fall into the water
00:52:25and are eaten by bacteria,
00:52:27which turn them into methane.
00:52:29It's very pretty to look at,
00:52:31but dangerous,
00:52:33because they are easily flammable.
00:52:35When temperatures rise in spring,
00:52:37the ice melts and these gas bubbles
00:52:39burst and crack.
00:52:41It's quite spectacular,
00:52:43but remember not to have
00:52:45a fire source nearby.
00:52:47Scientists have found these types
00:52:49of rocks on more than 900 meters long.
00:52:51The Kerak Bolten rock
00:52:53was trapped between two walls
00:52:55of rocks during the alternation
00:52:57of the melting of the Norwegian glaciers
00:52:59and the flooding of the valleys.
00:53:01It has become a popular hiking spot
00:53:03and an Instagram star.
00:53:05It is located at more than
00:53:071,000 meters above sea level.
00:53:09These clouds are called
00:53:11lenticular clouds,
00:53:13and they create a magnificent illusion.
00:53:15It looks like the mountains
00:53:17and it's foggy.
00:53:19These clouds are more frequent
00:53:21when strong winds blow
00:53:23on rough terrain.
00:53:25Mount Fuji is famous
00:53:27for its lenticular clouds,
00:53:29but you can also see them
00:53:31on Mount Rainer in Washington
00:53:33and on Mount Erigal in Ireland.
00:53:35This giant limestone point
00:53:37forest is called Tsingy,
00:53:39a Malagasy word
00:53:41which means needle.
00:53:43To see the formations
00:53:45of this national park,
00:53:47a bridge has been installed
00:53:49where tourists can cross it.
00:53:51It covers more than 1,500 square kilometers.
00:53:53This forest is composed
00:53:55of rock pinnacles
00:53:57reaching up to 60 meters high.
00:53:59During the cold season,
00:54:01the Letchworth State Park
00:54:03in New York State,
00:54:05sometimes nicknamed
00:54:07the Grand Canyon of the East,
00:54:09also sees curious phenomena occur.
00:54:11The water of a natural fountain
00:54:13also grows over the winter,
00:54:15sometimes reaching
00:54:17a height of 15 meters.
00:54:19The Selenis cereus
00:54:21grows florus.
00:54:23This thing generally looks
00:54:25like a fluttering cactus.
00:54:27But during a magical summer evening,
00:54:29this mysterious plant
00:54:31makes white flowers appear
00:54:33with vanilla fragrance.
00:54:35Unfortunately, it only lasts
00:54:37until the next morning.
00:54:39For botany lovers,
00:54:41the Tohono Tchoul Botanical Garden
00:54:43in Tucson is the largest
00:54:45collection of these plants.
00:54:47But the exhibition is quite difficult
00:54:49to organize because the flowering
00:54:51can only be predicted
00:54:53on the day it takes place.
00:54:55To witness a rare and golden waterfall,
00:54:57you can go to the Yosemite National Park
00:54:59and more precisely to the Horsetail Waterfall.
00:55:01Plan your trip in winter
00:55:03or early spring.
00:55:05This is the only time of the year
00:55:07when this strange phenomenon
00:55:09strikes the waterfall in such a unique way
00:55:11that it gives it the appearance
00:55:13of a lava or gold river.
00:55:15This is the reason why,
00:55:17at this time of the year,
00:55:19the waterfall is also called
00:55:21firefall.
00:55:23Unfortunately, this show
00:55:25is less and less visible
00:55:27over the years
00:55:29because of the drought.
00:55:31Imagine, you are watching
00:55:33a volcano erupt,
00:55:35which is already a rather frightening
00:55:37phenomenon.
00:55:39This makes the nightmarish
00:55:41character of the experience
00:55:43go to a whole other level.
00:55:45One of the causes of this phenomenon
00:55:47is static electricity,
00:55:49which occurs when dense ash particles
00:55:51rub against each other
00:55:53not very high above the ground.
00:55:55The other cause of volcanic flashes
00:55:57is very high above the surface,
00:55:59near the stratosphere,
00:56:01where chaotic moving ice crystals
00:56:03release powerful discharges.
00:56:05This is the result of a flat salt desert
00:56:07of more than 10,000 square kilometers.
00:56:09It is located in Bolivia,
00:56:11the highest country in South America.
00:56:13This natural mirror
00:56:15is a remnant of prehistoric lakes
00:56:17that evaporated a long time ago.
00:56:19Even if it looks flat,
00:56:21GPS technology has proven
00:56:23that part of the landscape
00:56:25has small reliefs
00:56:27less than 3 cm high.
00:56:29The area contains about
00:56:3110 billion tons of salt.
00:56:33Each neighbor pours a thin film of water
00:56:35which gives this impression of a mirror of the sky.
00:56:37Many inhabitants extract salt
00:56:39and lithium from it.
00:56:41And by the way, don't forget to visit
00:56:43the world's first salt hotel
00:56:45during your visit.
00:56:47You can find a real rainbow mountain
00:56:49in Peru.
00:56:51Scientists still don't know how to explain it.
00:56:53This colorful peak is difficult to reach,
00:56:55but seeing the colors blue, red, green,
00:56:57yellow and pink in nature
00:56:59is a spectacle worth all the effort.
00:57:01This thing that looks like
00:57:03frozen flying saucers
00:57:05is actually a set of highly flammable
00:57:07and combustible methane pockets.
00:57:09Trapped underwater,
00:57:11they form psychedelic landscapes
00:57:13and amazing patterns.
00:57:15Typical of northern lakes,
00:57:17like Lake Abraham in Alberta, Canada,
00:57:19these bubbles appear when leaves,
00:57:21plants and dead animals fall into the water
00:57:23and are consumed by bacteria.
00:57:25These bacteria then excrete methane.
00:57:27At the end of March 2018,
00:57:29the inhabitants of Eastern Europe
00:57:31witnessed an event as beautiful as frightening.
00:57:33Skiers slid on orange slopes
00:57:35under a red-tinted sky.
00:57:37Both perplexed and excited,
00:57:39people described this experience
00:57:41as a walk on Mars
00:57:43or a ski sand dune descent.
00:57:45But as mysterious as this phenomenon
00:57:47may seem,
00:57:49it has an explanation as simple as disappointing.
00:57:51The person responsible for this extraterrestrial landscape
00:57:53was a powerful sandstorm
00:57:55coming straight from the Sahara Desert.
00:57:57This storm carried particles of dust,
00:57:59sand and pollen
00:58:01that colored the snow orange.
00:58:03This is not an isolated natural phenomenon.
00:58:05Meteorologists say
00:58:07that orange snow covers Eastern Europe
00:58:09at least once every five years.
00:58:13On February 20 and 21, 2018,
00:58:15the inhabitants of the northeast of the United States
00:58:17witnessed one of the most extraordinary
00:58:19meteorological events of recent years.
00:58:21And it was...
00:58:23a wave of heat.
00:58:25In fact,
00:58:27it was the most impressive
00:58:29winter heat wave
00:58:31since official meteorological data
00:58:33began in the 1800s.
00:58:35For example, in Freiberg, Maine,
00:58:37people took off their coats
00:58:39when the temperature reached a surprising 21°C.
00:58:41In Fitchburg, Massachusetts,
00:58:43the Confucian inhabitants
00:58:45had no choice but to take off their sandals
00:58:47when they saw the outside temperature
00:58:49of 27°C.
00:58:51The same thing happened in Harrisburg,
00:58:53Pennsylvania,
00:58:55where the temperature reached 28°C.
00:58:57And in Wales, Maine,
00:58:59where the thermometer indicated 25°C.
00:59:01About 11,000 years ago,
00:59:03in present-day Turkey,
00:59:05while no city or metal tools existed,
00:59:07incredibly skilled craftsmen
00:59:09completed the site of Gobekli Tepe.
00:59:11We still don't know
00:59:13how they managed to break
00:59:15and lift blocks of limestone
00:59:17three times heavier than a T-Rex,
00:59:19or even what they symbolize.
00:59:21What's interesting about the Devil's Tower
00:59:23in Wyoming, in the United States,
00:59:25is that scientists still don't know
00:59:27how it came to be.
00:59:29It's a 264-meter-high rock formation
00:59:31whose walls are so stiff
00:59:33that they are practically vertical.
00:59:35This piece of stone simply rose
00:59:37in the middle of the valley plains of Wyoming,
00:59:39with nothing resembling
00:59:41kilometers in circumference.
00:59:43So how is it that such a flat landscape
00:59:45could suddenly give birth
00:59:47to something so high?
00:59:49But no one has the answer yet.
00:59:51The Plitvice Lakes National Park
00:59:53is a major tourist attraction
00:59:55in Croatia
00:59:57and a World Heritage Site,
00:59:59with the many unique animals and plants
01:00:01that live nearby.
01:00:03It looks like a movie set,
01:00:05with endless waterfalls
01:00:07and clear lakes all around.
01:00:09In the mid-1980s,
01:00:11a submarine diver
01:00:13discovered the submarine structure
01:00:15of Yonaguni off the Japanese coast.
01:00:17Scientists are convinced
01:00:19that this set of reliefs
01:00:21is several thousand years old,
01:00:23but they still can't determine
01:00:25whether it is natural or artificial.
01:00:27If it turns out to be an ancient city,
01:00:29the new mystery is the following.
01:00:31What lost civilization built it
01:00:33and how did it get to the bottom of the sea?
01:00:35The formation of these rocks
01:00:37is not the result of the work
01:00:39of a few humans.
01:00:41They were created by intense volcanic eruptions.
01:00:43Scientists still don't know
01:00:45why these rocks have such a strange shape.
01:00:47In 1812, for some unknown reason,
01:00:49an English farmer paid a local painter
01:00:51to raise tons of earth
01:00:53on the side of a hill
01:00:55and fill the contours with chalk.
01:00:57The painter fled with the money
01:00:59so that the farmer had to pay
01:01:01a second time for Alton Barnes'
01:01:03white horse to be finished.
01:01:05In Iceland, the Black Falls
01:01:07take the name of the dark lava columns
01:01:09around it.
01:01:11The base of the waterfall
01:01:13and all the structure
01:01:15inspired the Icelandic architecture
01:01:17that can be seen in some of their famous buildings.
01:01:19You can see ice hair
01:01:21in the forest on a wet winter night.
01:01:23Similar to Santa's beard
01:01:25or a wig of white hair,
01:01:27unusual ice crystals grow
01:01:29on the rotten wood.
01:01:31Unfortunately, this beauty
01:01:33melts as soon as the sun rises.
01:01:35It is only recently that scientists
01:01:37have understood what creates
01:01:39the ice hair,
01:01:41allowing the ice to form
01:01:43very thin hairs
01:01:45to keep this shape all night long.
01:01:47When this particular type of mushroom
01:01:49is not present, instead of fragile hairs,
01:01:51the ice forms a structure
01:01:53similar to a crust.
01:01:55One of the most common causes
01:01:57of forest fires is the powder
01:01:59from storms.
01:02:01But have you ever heard of a forest fire
01:02:03that triggered a storm?
01:02:05Such an event occurred on May 11, 2018,
01:02:07not far from Amarillo, Texas.
01:02:09The super fire Malard
01:02:11not only created a massive and dense cloud,
01:02:13high in the air,
01:02:15its heat also caused a violent storm
01:02:17which then poured tons of hail
01:02:19100 km away,
01:02:21in the county of Wheeler.
01:02:23Carringe is the strangest site
01:02:25in Nebraska.
01:02:27Its author studied Stonehenge
01:02:29and created his own version
01:02:31from old cars in tribute to his father.
01:02:33Some cars stand like monoliths,
01:02:35others are connected in arches.
01:02:37When he was asked
01:02:39why he had done all this,
01:02:41the creator replied,
01:02:43and why not?
01:02:45Another copy of Stonehenge
01:02:47was discovered at the bottom of Lake Michigan
01:02:49in 2007.
01:02:51There is indeed a set of rocks in a circle
01:02:53with engravings of mastodons.
01:02:55This beast ceased to exist
01:02:57more than 10,000 years ago,
01:02:59so the sculpture must be older than that.
01:03:01Its location is kept secret for the public.
01:03:03Good luck finding it!
01:03:05The Hudson Bay, in Canada,
01:03:07is probably the only place in the world
01:03:09where gravity is lower than anywhere else on the planet.
01:03:11And even skeptics have to believe it,
01:03:13because the difference
01:03:15has been measured with precision equipment.
01:03:17So, does this mean
01:03:19that gravity there is as low as,
01:03:21let's say, on the Moon?
01:03:23Unfortunately, no.
01:03:25The difference is tiny.
01:03:27The exact value is 0.005%,
01:03:29or one hundredth of a percent.
01:03:31You won't be able to feel it
01:03:33even if you pay attention to it.
01:03:35Scientists say that this anomaly
01:03:37is due to the layer of ice
01:03:39that covered the region about 10,000 years ago.
01:03:41It compressed the rocks so much
01:03:43that they still can't fully recover,
01:03:45which moved the gravitational field
01:03:47of the Hudson Bay.
01:03:49But in the distant future,
01:03:51gravity will return to normal.
01:03:53In 2010, fossilized fish
01:03:55were discovered
01:03:57400 km west of the island,
01:03:59where the Sahara Desert
01:04:01is more arid than ever.
01:04:03This fortuitous discovery
01:04:05led scientists to think
01:04:07that there could have been a sea
01:04:09where the Sahara is now.
01:04:11They therefore conducted a geological study
01:04:13of the area,
01:04:15and this gave unexpected results.
01:04:17They found evidence of something
01:04:19huge under the sands,
01:04:21and it was not part of a sea.
01:04:23For several months,
01:04:25the research continued
01:04:27with GPS equipment on the ground,
01:04:29and scientists observed the area
01:04:31from a satellite.
01:04:33The view was stunning.
01:04:35It turned out that there was
01:04:37a huge basin under the desert,
01:04:39with another smaller one nearby.
01:04:41On the banks of these basins,
01:04:43ancient human camps had been discovered.
01:04:45And now, researchers are finally able
01:04:47to know why they had chosen
01:04:49these places to live.
01:04:51There was an impressive lake
01:04:53with over 109,000 square kilometers
01:04:55of fresh water in total,
01:04:57called Lake Michigan.