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Did you know?
The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.