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Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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The average office desk has 400 times more bacteria on it than a toilet.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.