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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

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Vaccines prevent between 2.5 and 4 million deaths every year.

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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.

Diagram of a flagellate stramenopile cell, showing characteristic flagellar hairs. Diagram of a flagellate stramenopile cell, showing characteristic flagellar hairs.
Leukemia. A blood smear from a patient suffering from leukemia demonstrates the abundance of enlarge Leukemia. A blood smear from a patient suffering from leukemia demonstrates the abundance of enlarge
Emphysema. (a) Illustration comparing normal lungs and emphysemic lungs. The inserts illustrate how Emphysema. (a) Illustration comparing normal lungs and emphysemic lungs. The inserts illustrate how
The hand on the right exhibits the orange-tinged skin characteristic of carotenodermia The hand on the right exhibits the orange-tinged skin characteristic of carotenodermia
Summary of Life's Characteristic Summary of Life's Characteristic
(a) The characteristic karyotype of Klinefelter syndrome. (b) The young man (left) in these photos h (a) The characteristic karyotype of Klinefelter syndrome. (b) The young man (left) in these photos h
Video: Medullary osmotic gradient: countercurrent multiplier, urea recycling & vasa recta countercurrent exchange

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