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 dot-C-O-J-P.

When it comes to a guide for your gut, count on YacL.

This is Scientific Americans' 60-second science.

I'm Steve Merski.

Got a minute?

The word Siberia is almost a synonym for extreme cold.

It's hard enough to imagine living there today, but humans have been wandering the icy terrain for thousands of years.

The accepted estimate for the arrival of the first humans north of the Arctic Circle was upped in 2004 from about 12 years. The accepted estimate for the arrival of the first humans north of the Arctic Circle

was upped in 2004 from about 12,000 years ago to 35,000 years ago. And now that number's been

revised again, because in 2012, a young boy some 1,250 miles south of the North Pole in Siberia

stumbled across the leg bones of a woolly mammoth protruding out of the ground.

What really made this a super important find were two things.

Anne Gibbons, contributing correspondent for the journal Science,

which published an analysis of the frozen mammoth,

talking about the finding on the science podcast.

One, it had a lot of injuries that showed it had been battered and shot with projectile points

by humans. And then the second part that was really exciting was that when they used

radio carbon dating, it dated to about 45,000 years of age. So this was at least 10,000 years

...