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Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

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A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

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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.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Superior view of heart valves illustrating position, size, and shape of each valve. Superior view of heart valves illustrating position, size, and shape of each valve.
Standard Model of Elementary Particles Standard Model of Elementary Particles
Biodiversity Depends on the Size of Habitat Biodiversity Depends on the Size of Habitat
Primary aging means changes in hair color and skin texture for almost everyone. Primary aging means changes in hair color and skin texture for almost everyone.
Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many
The side injector combines with the shape of the piston to create a swirl as the piston moves up ... The side injector combines with the shape of the piston to create a swirl as the piston moves up ...
Video: Glucose anabolism reactions: Glycogenolysis and Gluconeogenesis

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