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Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.


