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Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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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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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.