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ManusiaTranskrip
00:00Do you know how rubber was originally formed?
00:03It all starts with the gum tree or its scientific name Hefea brasiliensis which originates from the rainforests of South America.
00:11In the beginning, native people collected the native sap that came out of the tree trunk and used it to make balls, water containers, and even waterproof clothing.
00:20Then in the 19th century, a man named Charles Goodyear discovered an important process known as vulcanization, which involves heating rubber with sulfur, making it stronger, more elastic and more durable.
00:33The result was the birth of the modern rubber revolution that we use today instead of tires.