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

The word duet usually refers to a song.

But in a sense, every human conversation is a duet,

with unwritten rules about when participants take their turns to speak.

You can hear how awkward it sounds when the rules are broken,

as with the slight delay between this ABC news host and the astronaut Rick Mastrochio.

So give us an idea of what you guys go through on a daily basis.

Okay, well, we wake up fairly early.

That long pause, pretty uncomfortable,

especially if you're not talking to someone on the space station.

We humans first get a feel for this back-and-forth rhythm when we're still babbling babies.

And it turns out, same goes for songbirds in learning their duets.

What you should hear is something like the whistle, like, and then something like, and then tru-r-but-then-you-r- and then tru but then you hear like it's yeah

I'm not very good at doing the song but it seems that only one bird is singing that's how good

they are.

Carla Rivera Casares, a postdoctoral fellow at the University of Miami.

She and her team recorded the formative songs of a bird called the Cane Break Wren, in their

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