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Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
Everyone has one nostril that is larger than the other.
Did you know?
Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
Did you know?
During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.