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 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's 60-second science. I'm Maddie Bender.

Compared to its more famous bushy-tailed cousin, the tree squirrel, the golden-mantled ground squirrel

looks a lot like a chipmunk and spends most of the year hibernating. And talk about bird-brained.

Ground squirrel's brains are about the size of the

pine nuts they eat. So it might come as a surprise that according to new research, these squirrels

have observable personalities. But it's something Jacqueline Alipurdy noticed back in 2015 when she

joined a project at the Rocky Mountain Biological Laboratory in Gothic, Colorado.

There, they'd been studying the behavior of golden-mantled ground squirrels for over 30 years.

To her, some of the squirrels seem skittish and shy, while others were more than happy to get

up close and personal for a snack.

I look away for a second, and they're sneaking into my bag and trying to get at

the peanut butter. They're following me around instead of me following them around. What's going on here?

It's supposed to be the other way around. Other scientists had observed individual animals that looked like

they might have personalities, but no one had evaluated them rigorously to see if their quirks met the definition

of consistent behavior over time. From 2016 to 2018, Alipurdy put dozens of squirrels

through a four-part Olympics that assessed the rodents on four characteristics, activity, sociability,

boldness, and aggressiveness. Essentially, a Myers-Briggs personality test for ground squirrels.

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