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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.

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A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

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The horizontal fraction bar was introduced by the Arabs.

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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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.

A seashell vendor in Tanzania sells to tourists seashells which have been taken from the sea alive, A seashell vendor in Tanzania sells to tourists seashells which have been taken from the sea alive,
Cast of Isotelus rex, the largest known trilobite from the middle to upper Ordovician of North Ameri Cast of Isotelus rex, the largest known trilobite from the middle to upper Ordovician of North Ameri
A person with a defective "P" gene might only have it effect the Hair A person with a defective "P" gene might only have it effect the Hair
Trees provide ecosystem services to people Trees provide ecosystem services to people
Infants and Children Prenatal Through Middle Childhood — 7e Infants and Children Prenatal Through Middle Childhood — 7e
(left) Urine sample from an unaffected person does not change color upon exposure to air. (right) Ur (left) Urine sample from an unaffected person does not change color upon exposure to air. (right) Ur
Video: Bulk flow - Factors that influence bulk flow

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