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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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

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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

In 2006 an Iraqi tribunal convicted Saddam Hussein of murdering his own people and sentenced him to In 2006 an Iraqi tribunal convicted Saddam Hussein of murdering his own people and sentenced him to
How people use space as they interact is studied by sociologists who have a microsociological focus. ... How people use space as they interact is studied by sociologists who have a microsociological focus. ...
Homeless people sleeping on the streets is a common sight in India’s cities. I took this photo in ... Homeless people sleeping on the streets is a common sight in India’s cities. I took this photo in ...
Marketing: Real People, Real Choices Marketing: Real People, Real Choices
By the People: A History of the United States, AP Edition By the People: A History of the United States, AP Edition
Video: Virtual Enzyme Kinetics & Lineweaver Burk Plot

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