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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
Did you know?
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Did you know?
Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
Did you know?
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.