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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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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

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Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

In this painting evangelist George Whitefield appears to be cross-eyed. This is no fault of John Wol In this painting evangelist George Whitefield appears to be cross-eyed. This is no fault of John Wol
The Land Ordinance of 1785 called for surveying and dividing the Western Territories into square mil The Land Ordinance of 1785 called for surveying and dividing the Western Territories into square mil
Surgical needle shapes: (A) taper point; (B) cutting point. Surgical needle shapes: (A) taper point; (B) cutting point.
Deep vein thrombosis Deep vein thrombosis
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Video: Introduction to Genetics

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