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

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

Yachtold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

To learn more about Yachtolt, visit yawcult.co.

.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 American 60 Second Science.

I'm Maddie Bender.

Take a walk in the woods after dark, and you might hear crickets chirping or frogs ribbiting.

But there's a sound you'll never hear

unless you're traveling across the equator in the center of Africa from

Liberia to Uganda. This is the call of the tree hyracks, a small furry mammal that looks like a cross

between a groundhog and a ground squirrel, minus the

bushy tail. John Oates, a professor emeritus of anthropology at Hunter College, says

hyrax calls are like none other. The most characteristic sound of the majority of tree

hierarchs populations across rainforest zone of Africa is a loud, repetitive,

shrieking or screaming cry that you only hear at night, which reverberates through the forest.

And if you've never heard it before at first, it's quite scary.

Each species of tree hirax has its own unique call.

Due to their distinctive shrieks, Oates and an international team of researchers discovered

a new species of the mammal.

In 2009, Oates was on an expedition across Nigeria in search of Gallagos, also known as bush babies.

Here's a Hirex call like the ones Oates and his colleagues heard in eastern Nigeria.

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