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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.
The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.
![Spiral Produced by twisting stresses that are spread along the length of a bone (note the break in t](https://biology-forums.com/gallery/47/medium_14755_24_09_12_7_46_02_8966120.jpeg)
![Colles’ A break in the distal portion of the radius; often the result of reaching out to cushion a f](https://biology-forums.com/gallery/47/medium_14755_24_09_12_7_46_02_89672333.jpeg)