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 Yachtol, visit yawcult.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 Yacult.

This is Scientific Americans' 60-second science.

I'm Jason Goldman.

Turns out that for hyenas, it's not what you know, but who you know.

Spotted hyenas live in large, mixed sex clans,

with fairly stable social hierarchies, and the females are in charge.

The matrilineal hierarchies that we see in spotted hyenas are also found in a lot of old world

monkeys.

Michigan State University biologist Eli Strauss.

It's been perplexing for a long time to a number of people.

What forces maintain this system,

because it's somewhat unusual in the animal kingdom.

In some kinds of animal societies, your place in the dominance hierarchy can be explained by

physical attributes, like body size. But in other animals, dominance rank can be acquired

through things like age or nepotism.

Strauss and Collies collected data about five generations of four groups of wild-spotted hyenas in Kenya

that they observed over a 27-year period.

...