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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Scientists in Germany have developed a candy that doesn't cause cavities.
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Ernest Vincent Wright wrote a 50,000 word book titled 'Gadsby' which did not use the letter "e".
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All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
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