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An introduction to Leonardo da Vinci's genius focusing on his famous notebook sketches and the modern inventions they predicted.
In 1781, Thomas Paine came up with a model for a single-span bridge; in 1887, Adolf Eugen Fick made the first pair of contact lenses; and in 1907, Paul Cornu built the first helicopter. But Leonardo da Vinci thought of all these ideas more than five hundred years ago!
At once an artist, inventor, engineer, and scientist,...
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The inventions and inspiration of Benjamin Franklin and how they've stood the test of time
What would you do if you lived in a community without a library, hospital, post office, or fire department? If you were Benjamin Franklin, you'd set up these organizations yourself. Franklin also designed the lightning rod, suggested the idea of daylight savings time, and invented bifocals-all inspired by his common sense and intelligence. In this informative...
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