Understanding the human body is a team effort. That's where the Yachtel group comes in.

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.jp. That's Y-A-K-U-L-T.C-O.J-P. When it comes to a guide for your gut, count on Yacult.

This is Scientific Americans' 60-second Science. I'm Jason Goldman.

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They grow to about 20 inches long and weigh less than 10 pounds.

So you might not think they'd be the closest living relatives to elephants.

Meet the rock hyrax, sometimes called the rock rabbit or the Dassy, common in rocky areas of Africa and the Middle East.

They live in groups of up to 80 individuals.

The hyrax is, well, they're a mammal that has a rare phenomenon, which is singing.

We know a lot of birds singing, but we don't have many mammals that actually perform a song, a complex song with different syllables coming in bouts.

And these bouts are complex, and they, along the song, they get more and more complex.

They get longer.

They include more sounds.

Biomusicologist Ishae Weissman from Bariland University and Hebrew University in Israel.

We try to understand what the meaning of all this is, why a hyrax would waste time and

energy and expose himself also to predators by singing such a loud song.

Weissman and his team recorded the songs of male hyraxes during mating season, and they analyzed their structure.

We found, in fact, that the song is actually an advertisement for the male quality.

And in this song, the rarest and most

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