It started as a glacier. Then, about 13,000 years ago, it was a trickle, then a stream, and eventually a... more

Nature writer Leigh Ann Henion has spent countless hours uncovering mysteries of the darkness that unfold while we’re asleep. She’s... more

Once a year they come out, by the thousands. Fireflies. But these aren’t just any fireflies. These are Photinus Carolinas,... more

Four times in the past decade Lake Abert has completely dried up, a barren lakebed encrusted with salt. Salt lakes... more

Chris remembers Bear 399, "The Queen" of Grand Teton National Park that was struck and killed by a vehicle near... more

In the Florida Everglades, the Burmese python is an invasive species that's close to triggering an ecological collapse. We'll head... more

Cuyahoga Valley National Park is nestled between Akron and Cleveland, Ohio. It once was an industrial wasteland, filled with debris... more

We’re on a short break as we finish working on our stories for our series about America’s National Parks. I... more

We’re taking a short break from releasing episodes so we can work on more new stories for our series on... more

A decommissioned military base in northeast Oregon provides sanctuary for a recovering burrowing owl population.   David Johnson is founder of... more