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 Yachtold, visit yacult.co.com.j.

That's y-A-K-U-L-T dot-C-O-J-P.

When it comes to a guide for your gut, count on Yacolt.

Several dozen people pile out of a charter bus into a clearing in the central Amazon jungle.

They've driven to a research site called ZF2 from Manouse, the Amazon's largest city.

It's October, 2003.

Please, everybody.

Come closer. Come closer. They're the scientific advisors for one of the largest, and some say most important,

ecological experiments in the world, now in its final stages of construction.

Beto Kezada, an ecologist and one of the three leaders of the project, herds them into a semicircle.

It is so great to have you all here.

I'm Daniel Grossman, and this is Science Quickly.

Today we present the second of three episodes about Amazon Face,

Faces an acronym I'll explain later.

An experiment that could help forecast the future health of the Amazon Forest

and the rest of the planet as a result.

The The experiment's elaborate setup in six circular plots is almost done.

Around the perimeter of each of the two plots that are closest to completion,

16 metal spires rise up off the forest floor,

...