There's a woman named Veronica Seider who had vision 20x better than average. She could identify people more than a mile (1.6km) away.
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In 1542, French aristocrat Marguerite De La Rocque survived being marooned for 2 years alone on a remote island off the coast of Quebec.
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The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
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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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A man with locked-in syndrome, named Jean-Dominique Bauby, wrote an entire book by blinking his left eyelid.
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It has been estimated that a bite from a grizzly bear can crush a bowling ball.
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