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, yacult.co.com.j.

That's y-A-K-U-L-T dot-C-O-J-P.

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

This is Scientific American's 60-second science.

I'm Christopher in Taliatta.

Homo sapiens are nowhere near the fastest runners in the animal kingdom, but what we lack in speed,

we make up for in endurance. And we're specially equipped to go the distance. We've got bigger

butt muscles than other primates. We lost most of our fur, too, and sprouted lots of sweat

clans to help us cool off. Scientists believe our endurance running abilities began to appear

two to three million years ago, around the time the genus Homo came about, and a new study

suggests that a mutation in one key gene had something to do with it. The mutation in what's

called the CMAH gene

altered the types of sugar molecules that decorate the surfaces of every cell in our bodies,

which in turn may have made our muscles less prone to fatigue.

Researchers have now found that mice spread with that same mutation can run longer without tiring,

compared to regular mice.

The mice with a gene alteration also logged more miles running on their wheels, apparently for fun,

and they had more capillaries in their back leg muscles, which would increase the delivery of

nutrients and oxygen during endurance exercise. The complete stats are in the proceedings of the Royal Society B.

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