The human body produces and destroys 15 million blood cells every second.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.
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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
X-Ray Crystallography Helped Reveal the Structure of DNA