The Tucker Family, a 7 year old male from Hamilton asks on October 6, 2002,How many people have ever lived on earth? We have found data giving the population at differen points in history but not the total number over all time.
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To find the answer I went to Google, the best place on the web to find answers, and typed in: human population that ever lived. The answer was found at the math department of the University of Hawaii. It's about 96 billion people.
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