What is rubber? History of rubber
A big rubber tree in Mexico Olmec people, living in southern Mexico, invented rubber about 1600 BC. It was just as they were beginning to build their empire. Rubber starts out as [...]
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09, 2017
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08, 2017
History of Bicycles – Steel and feminism
A velocipede Early wooden bicycles Bicycles were invented bit by bit in many different countries. They grew out of earlier inventions like wheels (from Central Asia) and wheelbarrows and cranks (from China), but Karl [...]
