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Author Question: Charles Darwin a. grew up in modest circumstances. b. began to doubt the fixity of species ... (Read 116 times) |
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
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There are 20 feet of blood vessels in each square inch of human skin.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.