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-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 Christopher in Taliatta.

Go snorkeling in a lot of places, and you'll find coral.

But on Israel's Mediterranean coast...

I think it's the only place in the world that you can find whole historic villages submerged under the sea.

Ehud Galili is an underwater archaeologist at the University of Haifa. He says one

submerged village, called Telhrez, sits five to ten feet under the water. The community was populated

some 7,000 years ago. There, the archaeologists have found pottery and flint, human skeletons,

the remains of deer, cows, pigs and dogs, and hundreds of olive pits, probably the

remains of olive oil production. And the researchers also found a 300-foot-long stretch of huge boulders,

a wall. After ruling out possible other uses for the wall, like defense against enemies or

corraling animals, the scientists determined that the formation was actually

an ancient seawall, the oldest known example in the world. The results are in the journal

Plus One. The boulders that kept the waters of the Mediterranean from flooding the village came from

riverbeds, a mile or two away. And the researchers say it would have taken multiple people, or strong

beasts of burden, to move them into place,

suggesting that constructing the wall was a well-organized community effort.

But eventually, the sea beat the barrier.

...