The last time American Green cards were actually green was 1964.
60
Leonardo Da Vinci made a robotic lion in 1515 that would walk, sway, open its mouth and move its tail - it even had a compartment that opened to present flowers.
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The U.S. motto, 'In God We Trust', was not adopted as the national slogan until 1956.
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The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
118
Grenades were invented in China over 1,000 years ago.
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The Statue of Liberty was a gift of friendship resulting from the diplomatic relationship between the United States and France.
97
India invented the Number System. Zero was invented by Aryabhatta.
59
When Charles Darwin first discovered the Galapagos Tortoises, he tried to ride them!
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