Vaccines prevent between 2.5 and 4 million deaths every year.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.
A Steep-Gradient Stream
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The minimum number of moles of oxygen needed to completely consume 4 moles of C3H8O is ...