Across North America, mountain lions, bears and gray wolves have made a remarkable comeback over the last 50 years. Once nearly exterminated, these animals have been recovering their populations and ...

Sea urchins climb onto kelp when their densities are so high they remove all drift kelp and then actively forage on attached, living kelp. (Credit: Steve Lonhart / NOAA MBNMS) Tipping points are the ...

For decades, ecologists have puzzled over a mystery: Why do some natural habitats get overrun by invasive species while others seem to repel outside threats? In a classic 1958 book on the subject, the ...

A photographer shares the epiphanies she has had while chronicling underwater jungles off the California coast Avery Schuyler Nunn The kelp forest is my favorite ecosystem on Earth. I first began ...

On a special episode (first released on August 13, 2025) of The Excerpt podcast: 'Freakosystems' are novel ecosystems where native and invasive species mix. What do these wild wonders reveal about the ...

A grey wolf prowls through Yellowstone National Park near Mammoth Hot Springs in Montana. A group of 66 wolves was reintroduced to Idaho and Yellowstone in the late 1990s. They now total 2,800 ...