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Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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.