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Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

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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).

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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

(A) Scratch test; patient is exposed to allergens through a light scratch on the skin; (B) Positive (A) Scratch test; patient is exposed to allergens through a light scratch on the skin; (B) Positive
Muscle Strength of the Hip, Abduction with Opposing Force Muscle Strength of the Hip, Abduction with Opposing Force
Japanese farmers create pentagon-shaped oranges Japanese farmers create pentagon-shaped oranges
Macro-, Meso-, Micro-Levels of Society Macro-, Meso-, Micro-Levels of Society
Insulin, glucagon and blood glucose levels Insulin, glucagon and blood glucose levels
finding the resultant force finding the resultant force
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