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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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If you could remove all of your skin, it would weigh up to 5 pounds.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.