Pierre Jaquet-Droz, a watchmaker, 240 years ago invented a robot that could write, and the parts could be interchanged to say whatever you want.
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As of April 2010, Bill Gates had donated $36,854,000,000 in his lifetime! That's more than half of his total net worth!
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Leonardo da Vinci could write with one hand and draw with the other at the same time.
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In Japan, watermelons are grown into the shape of a square so they are easier to stack and transport.
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You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
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