Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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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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People about to have surgery must tell their health care providers about all supplements they take.
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The longest a person has survived after a heart transplant is 24 years.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
REM Sleep and Learning
Order and Duration of Sleep Stages Through a Typical Night