Best Inventions of 2007

From the phone that has changed phones forever, to futuristic cars, to a building made of water, to a remote-controlled dragonfly — a dazzling display of ingenuity

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Pythagoras (circa 580-500 B.C.)

Inventor Pythagoras

Mansell Collection / Time Life Pictures / Getty

He proved the Pythagorean theorem: in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

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