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.

Yacold 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.

.j.p. 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 Julia Rosen.

In 2013, two mountaineers were nearing the top of Volcan Zhujujico, a 22,000-foot-tall volcano on the border of Chile and Argentina, when they saw something unexpected.

Just 2,000 feet below the summit, the climbers spotted a mouse scurrying across the snow.

And it's really a remarkable sighting because no one expected wild mammals to be living at an elevation of over 20,000 feet.

At that elevation, it's the scarcity of oxygen that makes it really a challenging place to survive and function.

But then also just the extreme cold.

It's an extremely inhospitable environment.

Jay Stortz, an evolutionary biologist at the University of Nebraska.

The climbers reached out to Storz because he studies how animals adapt to high altitudes,

and he was so intrigued that he decided to make his own trip to survey the area.

Stortz and his colleagues spent a month at Zhujajiko earlier this year, where they

confirmed what the climbers saw. They found mice everywhere, including on the summit,

officially setting a new record for the world's highest-dwelling mammal.

Stortz says the summit siting was fortuitous. His climbing partner,

Mario Perez Mamani, saw the mouse dive under a rock just as Storz made it to the top, exhausted and

groggy from the thin air. It took Storz a minute to gather his wits, but he eventually managed to

catch the mouse with his hands. Storz collected that mouse and others as museum specimens that will enable

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