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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Did you know?
There are 60,000 miles of blood vessels in every adult human.