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In 1864, the first barbiturate (barbituric acid) was synthesized.

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About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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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.

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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

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chitinous, exoskeletal surface of a male louse chitinous, exoskeletal surface of a male louse
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Video: Role of complement proteins

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