Videos Tagged: leonardo da vinci

History
History of Helicopters
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The earliest invention for vertical flight that we know comes from China. It is known that since 400 years BC, children in China played with bamboo flying toys. Children attached a stick to a ro...

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The fight for the right to serve in the military started back during the revolutionary war
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Most of us consume chocolate as a dessert. But that is that all chocolate can be? Some people put dark chocolate in thei...
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President Richard Nixon funded his first congressional electoral campaign in 1946. How he won so much money?
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For some people traveling is a way to conquer something. They want more than just relax and fun
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