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Did you know?
Your heart beats over 36 million times a year.
Did you know?
If you could remove all of your skin, it would weigh up to 5 pounds.
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?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.