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

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com.j. 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 American 60-second science. I'm Cynthia Graber. Got a minute?

Want to know the root humans took when they first migrated from Africa into Europe?

Seems that they might have marked the path. Not like Hansel and Gretel, who consciously left breadcrumbs,

ancient humans ate as they tracked, and they appear to have checked aside the packaging for some of their slimy sustenance.

Snails.

Conventional wisdom has been that humans initially traveled from Africa to the Near East,

then up around the Mediterranean through Lebanon, before heading into Europe some 40,000

years ago.

But recently, some scientists have theorized that humans made it to Europe first and then headed

east. Now there's more support for the Old View that humans made it to Europe first and then headed east.

Now there's more support for the old view that humans traveled through the Levant on the way to Europe in the form of the shells of edible marine snails. The study is in the proceedings of the National

Academy of Sciences. Researchers evaluated shells from an archaeological site dated to the Upper Paleolithic

in Lebanon. The shells were mostly

intact, except the tapered pointy tip had been removed, most likely for easier access to the meat

inside. The scientists calculated the age of the shells via a variety of methods, and they found that

the snails dated back almost 46,000 years. The earliest evidence of modern human remains in Europe seems to be no more than

45,000 years old. The snail evidence thus adds weight to the hypothesis that ancient people

...