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Did you know?
Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
Did you know?
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

