Word: parred
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Dates: during 2000-2009
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...female chimp named Ai to count and manipulate numbers. In an article published in a forthcoming edition of Nature, researchers report that Ai was usually able to memorize and repeat sequences when flashed with any five numbers between 1 and 9 in random order - putting her at least on par with the average preschooler. Adult humans, in contrast, usually have a difficult time remembering more than seven random numbers (hence the length of phone numbers). Animals have long shown the ability to memorize a number sequence by, say, counting to five, but researchers hadn't previously confirmed that the animals...