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This is Scientific American's 60-second science. I'm Christopher in Taliatta.

The animal kingdom is a noisy place.

There's birdsong,

choruses of frogs,

and lots of lesser-known sounds,

like the Raygun-like sounds,

of baby alligators, hatching, and calling for mom.

There's lots of videos of them doing this on YouTube, if you're curious.

When I was a kid growing up, I had a pet alligator, and it vocalized a lot.

John Weins, an evolutionary ecologist at the University of Arizona.

So I had this baby alligator when I was a teenager, and sometimes, you know, I could hear

and when they grow up, they do bellows and slaps and all sorts of sounds.

Wien's and his collaborator Joe Chen wondered, why did animals start vocalizing in the first place?

Well, one hypothesis was that the ability originated in nocturnal animals,

because, you know, sound works a lot better than

colors or horns or other visual cues when you can't see. Wienes and Chen built an evolutionary tree

of nearly 1,800 vertebrate species, and they mapped onto it information on whether each

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