Monkey mom teaches her baby to use dental floss

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.