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Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Did you know?
Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.