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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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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.