There are 60,000 miles of blood vessels in every adult human.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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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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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
A true albino squirrel. Note the pink eyes.
True-color view of Mars seen through NASA's Hubble Space Telescope in 1999