To help its iconic mountain lions and other wildlife navigate the city, Los Angeles is breaking new ground.
More than 600,000 miles of fences crisscross the American West, blocking animal migration. Outside Yellowstone last summer, volunteers dismantled a few.
For decades, toxic runoff from abandoned coal mines has left streams and rivers lifeless in West Virginia. Here's how two men decided to reverse the damage taking place in their own backyards.
We can live and even raise livestock successfully in a landscape with jaguars – if we do it right. In 25 years of jaguar-related work, this is what I've learned.
Kelp forests are critical ecosystems and effective carbon sinks, too – but they're under threat around the world. This team of free divers and scientists is trying to make a difference, one purple urchin at a time.