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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.
Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.