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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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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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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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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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.
The effects of germ-line versus somatic cell mutations.
General features of a growth factor or hormone signalling pathway that promotes cell division