Nature

How Do You Ship a Depressed Polar Bear?

Soccer fans aren't the only depressed creatures in Argentina these days. Arturo the polar bear, a 28-year-old male who lives at the Mendoza Zoo, has been swaying back and forth, shaking his head and...

The Hidden Traps Killing Our Dogs

Earlier this year, Terry Dubois went hiking with a few friends and four dogs. They were three miles from town when her 12-year-old heeler, Jetta, suddenly began shrieking.

The Appalachian Trail Mystery

Paul D. Paur left behind all his worldly possessions and entered the Appalachian Trail in early June. Concerns about his mental health surfaced alongside reports from fellow hikers that Paur is...

The Freedivers Who Eavesdrop on Whales

It's not easy to swim with sperm whales: they're hard to find, hard to reach without adequate diving experience, and they just might swallow you up if you get too close. But how else are we going to...

The Day We Set the Colorado River Free

It's been more than 50 years since the Colorado River regularly reached the sea. But this spring, the U.S. and Mexico let the water storm through its natural delta for a grand experiment in...