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This is Scientific Americans 60 seconds. I'm Mark Stratton.

Oh, just imagine it chatting to a chimp in chimpanzee.

Whether portrayed by Rex Harrison Eddie Murphy or Robert Downey Jr.

Dr. Doolittle learned to talk to animals.

But in reality, science has remained some distance from solving the long-standing question of how we humans learn to talk during our evolution.

Here's one new clue. A team of researchers in Great Britain have

demonstrated how the rapid succession of opening and closing mouth rhythms by

chimpanzees, known as lip-smacking, mimics the natural pace of human mouths talking.

The findings are in the journal Biology Letters.

This phenomenon has been observed before in other ape species who perform lip-smacking movements at around 5 hurts,

which falls within a range of mouth opens and closes, characteristic of all spoken languages, namely between 2 and 7

hurts. But this lip-smacking timing connection had not been made in our

closest evolutionary relatives until now.

...