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Screen picture of a video released by the Primate Research Center of Tokyo University on March 11, 2009, shows a Crab-eating Macaque mother teaches her child to "brush teeth" in a temple ruins, more than 100 kilometers North East of Bangkok, capital of Thailand. Rearchers from the Primate Research Center found that a group of Crab-eating Macaques live in the temple ruins, and femal Macaques can teach their children to "brush teeth" consciously. Ten years ago, people found that some of these Crab-eating Macaques picked people's fallen hair and used them to clean their teeth as dental floss. Gradually, the number of macaques who can "brush teeth" climbs to nearly 100. |
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