UCSD cognitive scientist Rafael Nunez, seen from the back, conducts a counting experiment with the resident of a village in Papua New Guinea in this undated photograph. Sign on to any news website and ...
When you count to 20, you start at 1 (or zero) and count on until you reach 20. Each number is one more than the last. When you count back from 20, you start at 20 and count back until you reach 1 (or ...
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