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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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In 1864, the first barbiturate (barbituric acid) was synthesized.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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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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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.