Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Green tea is able to stop the scent of garlic or onion from causing bad breath.
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There are more bacteria in your mouth than there are people in the world.
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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.
The Border Collie is considered to be one of the most intelligent breeds.