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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
People about to have surgery must tell their health care providers about all supplements they take.
Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
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.