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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?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
Did you know?
If you could remove all of your skin, it would weigh up to 5 pounds.
Did you know?
The longest a person has survived after a heart transplant is 24 years.