Si les humains étaient à sang froid, nous dépendrions de l'environnement pour contrôler notre température corporelle, tout comme le font les reptiles ! Les jours frais, nous aurions besoin de nous prélasser au soleil pour nous réchauffer et être actifs, mais les jours très chauds, nous devrions trouver de l'ombre ou nous rafraîchir dans l'eau pour éviter la surchauffe. Nos besoins énergétiques chuteraient car les créatures à sang froid ne brûlent pas de calories pour rester au chaud, donc peut-être moins de collations—mais beaucoup plus de siestes ! La vie serait plus lente et plus liée au climat, et les climats extrêmes pourraient être difficiles pour la survie. Les maisons chauffées ou les systèmes de refroidissement sophistiqués pourraient ne plus avoir beaucoup d'importance ; nous nous adapterions simplement à notre environnement. Du bon côté, plus de transpiration ni de frissons—juste absorber les ambiances du temps ! Animation créée par Sympa.
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Musique par Epidemic Sound https://www.epidemicsound.com
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Nos réseaux sociaux :
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Stock de fichiers (photos, vidéos et autres):
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https://www.eastnews.ru
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FunTranscript
00:00If people had feathers, carcass claws, long beaks, pointy teeth and other animal characteristics,
00:06it would not radically change our lives.
00:09We would simply lose more money for a manicure and we would no longer need knives.
00:13We would have our claws integrated.
00:15The culture of food consumption would change if we had long beaks.
00:19Feather maintenance would create new branches in the field of fashion and personal care.
00:24All these things help animals survive in nature, but they would be useless to us.
00:29What would completely change our lives, however, would be a decrease in our blood temperature.
00:35The circulation of a cold fluid in our body would change our way of life
00:39and open the way to physiological changes.
00:42The most interesting thing is that the number of bacteria in our bodies would decrease considerably.
00:48Our warm body offers an ideal temperature for good and bad bacteria.
00:53But if we became cold, most microbes would not survive.
00:57They could not reproduce and we would go to the doctor less often.
01:01But there would be a drawback.
01:04Rare microbes capable of adapting to low temperatures would cause us serious health problems.
01:11Indeed, cold blood slows down the immune system.
01:14Protective cells fight less effectively against unwanted small guests.
01:20Another problem for humans is cold blood.
01:22It would depend on external conditions.
01:24We, warm-blooded creatures, can not survive at extreme temperatures either,
01:29but our bodies can react to any change and regulate the state of our body.
01:34For example, when we are hot, we sweat and we cool down.
01:38When we are cold, our muscles contract, we tremble,
01:42and blood circulates faster in our vessels to warm us up.
01:45These characteristics help us adapt to cold and heat.
01:49But if we had cold blood, we would lose this ability to regulate our body.
01:54We would be very sensitive to the slightest change in temperature.
01:57Imagine all these reptiles living in apartment terrariums.
02:01Their owners buy expensive lamps to heat their homes.
02:04We would have to equip our houses in the same way.
02:08With cold blood in our veins, we would not become more resistant to low temperatures.
02:13We would even become more dependent on heat sources.
02:16We would waste a huge amount of energy on heating and gas stoves.
02:20And in cold weather, we would spend all our money on heating.
02:24But our financial situation would remain unchanged,
02:27because we would spend less money on food.
02:30Warm-blooded creatures use a lot of energy to maintain the temperature of their bodies at a high level.
02:37And they draw this energy into their food.
02:39As a result, with cold blood, humans would eat a lot less and would have a slower metabolism.
02:45A hearty breakfast in the morning would be enough to function normally all day.
02:50However, not everyone has the means to manage high electricity bills.
02:54In cold regions, we would have to keep our heating on almost all year round.
02:59A cheaper solution would be to get closer to the equator.
03:02Almost all cold-blooded people would migrate to these regions.
03:06The northern lands would be deserted.
03:08And in the southern regions, there would be overpopulation problems.
03:14It would be very difficult for so many people to live comfortably in such restricted territories.
03:19The construction of hundreds of thousands of buildings,
03:22millions of cars producing exhaust gases, factories and factories
03:26would considerably worsen the environmental situation of the equator.
03:31An increased density of the population would lead to disaster.
03:34But fortunately, our cold bodies would help us solve this problem.
03:39You know that bears hibernate.
03:41These warm-blooded animals accumulate fat and take refuge in their den to spend the winter there.
03:46During this period, their bodies feed on stored fat.
03:50Well, cold-blooded animals are also able to do that.
03:54And unlike bears, they don't need to make extra calories
03:58because their energy needs are far less.
04:01Turtles and frogs can dive into the lakes and ponds
04:05and spend up to six months there.
04:07All the liquid in their bodies freezes, but their cells remain alive.
04:11This allows them to easily go through difficult periods.
04:14Ideally, this ability would therefore allow people to reduce the load that would weigh on the planet.
04:20It would not be necessary to go to the equator if you could spend six months of winter in your bed.
04:24And those who would live in these regions would hibernate around the clock.
04:28Did you sleep for six months?
04:29Great, now it's my turn.
04:33Of course, the economy of the planet would be considerably modified.
04:37Our production capacity would decrease.
04:40There would be fewer goods and services in the world.
04:42There would be fewer taxis in cities and fewer restaurants.
04:46But this would reduce the damage caused to the environment.
04:49Imagine how easy it would be to wait for the release of a film or a video game.
04:54And what would happen to our dreams?
04:56Fly in the clouds for six months
04:59or talk to a group of mutant seagulls on another planet?
05:03It would be pretty cool.
05:04Training centers for lucid dreaming would be open all over the world
05:08so that you can have fun during your hibernation.
05:11Everyone would not accept such conditions.
05:14Imagine that you train hard,
05:16that you follow a strict diet
05:19and that you lose six months of your life.
05:21All your progress would disappear
05:22and you would have to start all over again from the beginning.
05:25It is interesting to note that there would be fewer athletes in such a world.
05:29Another superpower of cold-blooded humans would be the ability to live underwater.
05:34Dolphins, whales, seals and other mammals living in the seas and oceans.
05:39But for one reason or another,
05:41evolution has not given them gills.
05:43They cannot extract oxygen from water like fish.
05:46And they have to go back to the surface several times a day.
05:50This is explained by the fact that they have hot blood.
05:53Cold-blooded fish do not need a lot of oxygen.
05:56They extract a small part of the water with their gills
05:59and that's enough for them.
06:01But this is not enough for hot-blooded creatures.
06:04If dolphins had gills,
06:06they would be huge.
06:08Because they need 15 times more oxygen per kilogram of mass
06:11than cold-blooded fish.
06:13The gills must constantly move large amounts of water
06:16to extract oxygen.
06:18Sharks must always be moving to be able to breathe.
06:22If humans had gills,
06:24they would be gigantic.
06:25And they should swim very fast and constantly
06:28to get the oxygen they need.
06:30But everything would be much easier if humans had cold blood.
06:34Maybe if we started living in water,
06:36evolution would give us gills after a few thousand years.
06:41We would have more chance of regenerating
06:43with a low body temperature.
06:45Sea stars, lizards and salamanders
06:49can repel their limbs and organs
06:52and even restore their entire body system.
06:55With such a superpower,
06:56we could overcome aging,
06:58save millions of visits to the doctor
07:01and avoid surgical operations.
07:03But would we be able to fly if cold blood flowed into our veins?
07:07Unfortunately, it would not give us wings.
07:09Birds are hot-blooded creatures with a fast metabolism.
07:13They need a lot of oxygen and energy to fly.
07:16If the inhabitants of a parallel universe could fly,
07:18their bones would be much lighter and more fragile.
07:21And their muscles more developed.
07:23Despite these anatomical modifications,
07:25they could not fly freely like pigeons or swans.
07:29Flying humans would be clumsy
07:31and would hardly maneuver in the air.
07:33They would have to absorb a lot of oxygen in flight.
07:36Or fly with oxygen bottles.
07:38But maybe evolution would make their lungs much bigger.
07:43Our cold blood, in spite of everything,
07:45would not benefit us in the end.
07:47Our brain may not be as developed
07:50because it would need less energy.
07:52So it's a good thing that our blood is hot.
07:54We have no branches,
07:56but we cross the oceans on boats.
07:58We will not regenerate quickly,
08:00but we have advanced medicine.
08:02We have a fast metabolism
08:04and there is a lot of delicious food in supermarkets.
08:07Today we have the ideal body structure
08:10to lead a comfortable existence in this world.
08:13But how would our life change
08:15if the temperature of our body was multiplied by 2?
08:18This will be the subject of another video.
08:20Stay tuned.