Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Sound travels about 4 times faster in water than in air.
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Neanderthal man had a brain capacity 100cc larger than modern man's.
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Cold water weighs more than hot water.
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Iron weighs more after it rusts.
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Nearly 50% of the world's scientists are assigned to military projects.
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Scientists are now able to grow 'beating' heart tissue in a lab!
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