And now a very different kind of story about the environment.

Beavers and the dams they build are not always embraced in certain areas.

They can create problems with flooding, crops, and other damage.

But there's a growing recognition that they're also building a kind of natural infrastructure

that helps with water management, wildfire mitigation, and the climate.

Science correspondent Miles O'Brien went to see the beavers at work during their busy season and has the story for our ongoing coverage of the environment called tipping points.

This team of scientists is gearing up to get waist deep on a quest to better understand nature's hardworking engineers and climate warriors, beavers.

They invited me along, and I was, well, eager to join them.

We're going deep. Going deep into the world of beavers here. Leading this happy band of Beaver Believers is Emily Fairfax.

She's an eco-hydrologist, an assistant professor of geography at the University of Minnesota.

We met in southern Wyoming.

We're about to go into the Beaver Wetlands now.

We're in the Medicine Bow National Forest, and we're going into a beaver complex, which is like a huge beaver neighborhood,

maintained by one beaver family.

Before we began our trek, we got an advanced peak, thanks to Emily's prowess as a drone pilot.

So right now I'm flying over the corridor that the beavers have dammed, and we're seeing quite a few beaver ponds.

In 2020, a big wildfire ripped through here. There is still plenty of evidence of that.

Dead gray trees starkly defined the edges of a lush, linear oasis.

How long does this green swath go?

So right now, I've flown a half a kilometer away along this path, and it's all beaver engineered.

We think this is just one family doing this work here.

They take little... One family.

...