Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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There are 20 feet of blood vessels in each square inch of human skin.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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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The horizontal fraction bar was introduced by the Arabs.
The phosphorus cycle. Numbers are 1012 g P or fluxes as 1012 g P per year (data from Schlesinger 199
Rate of Residential Change, Past Year, in the United States
During my research in India, I interviewed this 8-year-old girl. Mahashury is a bonded laborer who ...