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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

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

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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

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