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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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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

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There are more bacteria in your mouth than there are people in the world.

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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

A marine food web in action: feeding baleen whales and birds. A marine food web in action: feeding baleen whales and birds.
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Video: DNA Sequences - Dideoxy Sequencing

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