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

This is Scientific Americans' 60 Second Science.

I'm Jason Goldman.

Domestic cats that live or go outside kill lots of wild animals.

Recent studies find that outdoor cats in North America take out between 10 and 30 billion birds and mammals each year. Still, it hasn't been clear what kind

of an impact the world's 600 million pet cats have on wildlife populations, and whether that

impact poses a threat to biodiversity conservation. Anyone who has a cat sees their cats bring

animals home. And the question is, well, does it matter?

And especially we wanted to know, where are the cats actually hunting?

Are they hunting in their backyards or are they going out into the nature preserves?

North Carolina State University zoologist Roland Kay's.

Together with colleagues in the UK, Australia, and New Zealand,

Kay's distributed small GPS trackers to citizen

scientist cat owners. They attached the trackers to their cat's collars. In all, more than 900

pet cats were tracked this way, all of which were routinely allowed to roam freely outside.

Some cats were true explorers.

One British cat called Max walked almost two kilometers back and forth along a road between two neighboring villages, twice.

But the majority were home bodies, rarely straying more than 100 meters from home.

...