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.

.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 Annie Sneed.

The Arctic's permafrost is melting and fast.

That's bad news because these frozen soils store billions of tons of carbon, just waiting to be unleashed.

So is there a way to save the permafrost?

One team of researchers thinks it may have found a possible solution.

Big animals.

Erbivores.

Animals that eat only plants.

Back in 1996, researchers started an experiment called Pleistocene Park.

They fenced in about eight square miles of land in northeast Siberia, and then they introduced

different types of herbivores, reindeer, horses, moose, bison, sheep, and other large critters.

Since then, scientists have studied these animals' effects on the ecosystem.

One outcome is that these large herbivores help keep the ground very cold, cooler than it would otherwise be.

The snow in winter is important for soil temperature because it acts as an insulating layer.

So the air in winter in the high lead juice is much colder than the soil.

Philip Perrata, a vegetation ecologist at the University of Hamburg.

So the idea of this experiment was to introduce large herbivores

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