Mountain lion sightings are on the rise in Los Angeles, but what’s causing these big cats to wander closer to urban areas? Habitat loss, prey availability, and human expansion are all factors—discover ...

Some animals are so rare, they only exist in a single U.S. state and nowhere else in the world! From isolated islands to ...

Unlike many Eastern states, Colorado has a growing moose population. In fact, there are so many moose in the park that ...

Rocky Mountain National Park is studying the impacts a booming moose population is having on its ailing willows and wetlands.

Under-sea mountains are key locations for predators -- with 41 times more sharks than the open ocean, new research shows.

The thriving bird colonies likely grew over several decades because local shepherds had temporarily eliminated pumas ...

Mountain West communities are split over the USFWS’ decision to manage isolated bear populations as one. But many agree that ...

We have a natural fascination with time—how landscapes have been carved over millennia, how our bodies grow and sag with age, ...

Travel like a local: Residents share their favorite places in our top city guides: New Orleans, Rome, Tokyo and Mexico City.

The Larimer Conservation District has removed more than 100,000 trees from Colorado's forests — all for the betterment of the land.

In December, the Federal Highway Administration awarded the first grants under a new $125 million Wildlife Crossings Pilot ...