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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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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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If you could remove all of your skin, it would weigh up to 5 pounds.