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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
Did you know?
Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

