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Ancient humans used hand axes earlier than thought
Question of the Day
Geologists collected about 150 samples of sediment from the site in 2007. To come up with an age, they used a technique known as paleomagnetic dating, which takes advantage of the flip-flop of Earth’s magnetic field every several hundred thousand years.
The tools were not too far from where the bones of Turkana Boy _ the most complete skeleton of a prehistoric human _ were unearthed in 1984.
Nature journal: www.nature.com/nature
Follow Alicia Chang at: http://twitter.com/SciWriAlicia
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