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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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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The average office desk has 400 times more bacteria on it than a toilet.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Apparent and True Orbits of Alpha Centauri.
True-color view of Mars seen through NASA's Hubble Space Telescope in 1999
True Friendship
A recruiting poster for the “True Sons of Freedom” encouraged African Americans to enlist. In fact,