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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.