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Did you know?
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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There are more bacteria in your mouth than there are people in the world.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
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In 1864, the first barbiturate (barbituric acid) was synthesized.