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Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
Did you know?
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
Did you know?
Illicit drug use costs the United States approximately $181 billion every year.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.