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.

Yachtold 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 Yachtol, 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 Americans 60 Second Science.

I'm Jason Goldman.

In the 1800s, many rivers in the American West were diverted for irrigation or dammed for generating electricity.

So rapidly expanding cities began tapping into groundwater.

Add climate change into the mix and you can see how an already arid desert can become even more parched. The banks of the Santa Cruz River in southeastern Arizona

were described in 1855 as covered with poplars and willows, ash trees and plantains,

oaks and walnut trees.

But a century later, the river was gone.

But it was the original river of Tucson and the reason the city is here.

Ecologist Michael Bogan from the University of Arizona.

Seventy years after it ran dry, the city of Tucson decided to release treated wastewater back into the river bed,

around 2.8 million gallons each day.

Bogan went to participate in the festivities when the valves were opened in June 2019.

And everybody was, you know, splashing around in the water and excited to see water back in the river.

And what I immediately got sidetracked was the number of dragonflies that I was seeing.

Within a few hours, Bogan counted seven different species of dragonflies.

He even saw dragonflies and damsel flies mating and laying eggs at a river that had not existed earlier that day.

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