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This is Scientific American's 60-second science.'m Christopher in Taliatta. Got a minute?

Babies come prepared to learn any of the world's languages.

Alison Bruderer, a cognitive scientist at the University of British Columbia.

Which means that no matter where you're growing up in the world,

their brains are prepared to pick up the language that they're listening to around them.

And listen, they do. But another key factor to discerning a language's particular sounds

may be for babies to move their tongues as they listen. Bruderer and her colleagues tested

that notion by sitting 24, six-month-olds in front of a video screen and displaying a checkerboard

pattern, while they played one of two tracks,

a single repeated D sound in Hindi, or two slightly different alternating D sounds.

Da!

The idea here is that babies have a short attention span, so novel things hold their gaze.

And indeed,

the babies did stare at the screen longer while the alternating Ds played than for the single D,

indicating they could detect the novelty. Until that is, the researchers blocked the baby's tongue movements by having them suck on a teething device. Then the effect disappeared, with the babies unable to differentiate

from and when the babies used a different teetheer that did not block tongue movement, they once again

appeared to comprehend the difference between the D's. The study is in the proceedings of the National

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