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Did you know?
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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There are more nerve cells in one human brain than there are stars in the Milky Way.