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What is rubber? History of rubber

By |2018-04-08T11:21:56+00:00September 8th, 2017|Science, South America|

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 the sap of a Central American tree - the rubber tree. You tap the tree or cut it down for the sap. Then you mix the sap [...]

History of Bicycles

By |2018-04-11T18:26:49+00:00August 7th, 2017|Modern Europe, Science|

A velocipede Bicycles were invented bit by bit in many different countries. They grew out of earlier inventions like wheels (from Central Asia) and wheelbarrows (from China), but Karl von Drais, a German inventor, built the first riding machine with two wheels, one in front of the other, that you had to balance on, in 1817. Like wheelbarrows, this [...]