In 2011, there were 3 known cases around the world of twins coming from different fathers.
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The Rain Man (Laurence Kim Peek) was the only savant known to science who could read two pages of a book simultaneously - one with each eye.
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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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The exact cause of death and burial site of Genghis Khan is unknown, because all of the 2000 funeral guests and 800 soldiers were killed in order to preserve the secret.
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The oldest living person smoked cigarettes from the age of 21 to 117.
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