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Did you know?
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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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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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
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Cyanide works by making the human body unable to use oxygen.
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There are more nerve cells in one human brain than there are stars in the Milky Way.