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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Diverse living organisms share common chemical features Diverse living organisms share common chemical features
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New Yorkers flee from the dust caused by the collapse of the twin towers of the World Trade Center f New Yorkers flee from the dust caused by the collapse of the twin towers of the World Trade Center f
Gerhard Richter, September. Gerhard Richter, September.
September 11, 2001. September 11, 2001.
Branched-chain amino acid oxidation, fatty acid b-oxidation, and the citric acid cycle share a commo Branched-chain amino acid oxidation, fatty acid b-oxidation, and the citric acid cycle share a commo
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