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Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
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.
Did you know?
Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).