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

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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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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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