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This is Scientific Americans 60 Second Science.

I'm Karen Hopkins.

Sounds can convey a lot of information.

They can alert animals to potential danger.

Let parents know when their offspring are hungry,

or serve as mating calls, territorial warnings,

or just a way to let others in the area know that you're there.

And it turns out that even embryos pay attention to this natural soundscape.

A growing body of research shows that for many animal species,

embryos use audio from their environment to guide their development,

a trick that can give them an advantage after they're born. So in the species that I study, the zebrafinch, we found that the parents make a special

call when it's hot and that those heat call prepare the development of the embryos for heat.

Milan Marriott of Deakin University in Australia.

She made this discovery by chance.

I was studying the communication between the parents at the nest.

When I noticed that sometimes when her parents was incubating the eggs by itself,

it was producing a call that was quite different to the others.

...