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There are more sensory neurons in the tongue than in any other part of the body.

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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

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To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Battle scene from The Birth of a Nation, directed by D. W. Griffith. Battle scene from The Birth of a Nation, directed by D. W. Griffith.
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