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Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
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?
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
Did you know?
On average, the stomach produces 2 L of hydrochloric acid per day.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.