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Did you know?

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.

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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Welcome sign for Kenton, Tennessee, an example of competition for "White Squirrel Capital" Welcome sign for Kenton, Tennessee, an example of competition for "White Squirrel Capital"
Two women having a conversation using American Sign Language. Two women having a conversation using American Sign Language.
Nephrolithiasis. Stones, or calculi, may form in several areas within the urinary tract. When they f Nephrolithiasis. Stones, or calculi, may form in several areas within the urinary tract. When they f
The American Sign Language Alphabet. The American Sign Language Alphabet.
Sign and symptoms of a patient with heart failure Sign and symptoms of a patient with heart failure
A piece of glass has a thin film of gasoline floating on it. A beam of light is shining ... A piece of glass has a thin film of gasoline floating on it. A beam of light is shining ...
Video: The Pressure Flow Model in a Plant

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