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 yacolp.co.

.jp. That's Y-A-K-U-L-T.C-O.jp. 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.

You're probably not too interested in what some people call ABC gum, already been chewed.

But for archaeologists, such gum, as long as it's really old, is a genetic gold mine.

It's a bit like, I guess, Jurassic Park.

Natalia Kashuba, a graduate student in archaeology at Uppsala University in Sweden.

She's referring to that famous clip from the movie about how Jurassic Park scientists extract blood from a mosquito trapped in amber.

Bingo. Dino DNA.

Except in this case, it's human DNA.

And it's not trapped in amber, but inside exceptionally

old chewing gums found at the site of an ancient hunting and fishing village on the west coast

of Sweden. The samples look like chewed up wads of modern-day gum, but don't think Wrigley's.

This detritus is black sticky tar, distilled from birch bark.

Kashuba has tasted modern-day versions and isn't eager to try it again.

Not unless I'm paid for it.

So why chew on something so unpleasant?

Maybe because their gum wasn't for fresh breath.

You could use it to seal your boat or seal your pots, so it's kind of a everyday use substance.

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