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There are 60,000 miles of blood vessels in every adult human.
Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.