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-Lt.C-O.jp. When it comes to a guide for your gut, count on Yacolt.

This is Scientific Americans' 60-second science. I'm Jason Goldman. Got a minute?

Humans aren't the only species that forms friendships.

Lots of animals prefer to spend their time with only certain individuals.

It's all very well showing that you do get social relationships and social bonds forming,

but why on earth would you form them in the first place?

University of Exeter, animal behavior researcher Rob Heathcote.

He and his team wanted to find out what benefit animals derive from close social relationships.

To do it, they set out for the Caribbean island of Trinidad, home of a small freshwater fish called the Trinidadian

guppy. These guppies live in environments that have tons of predators around. So basically,

it really sucks to be in a guppy in some of the places they live. You'll be watching these

shawls of guppies and a predator is attacking them probably every 20, 30 seconds or so.

One common idea is that such animals form social groups to reduce the risk of being gobbled

up. But Heathcote wanted to see whether the benefits of social living might come from the strength

of individual social relationships rather than simple safety in numbers. The researchers caught

240 female Chinidati and guppies, and divided them into groups of 15, each group in its own

small pool. While some of the fish were left alone, others were exposed to what looked like a

predator, a doll version of a guppy-e-eating fish called a pike-sichlet.

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