As the global population soars toward nine billion by 2045, this corner of Africa shows what’s at stake in the decades ahead.

A snowcapped backdrop to Seattle and Puget Sound, Mount Rainier is a slumbering giant that last erupted in the 1890s.

Learn about the dozens of species called birds of paradise. Discover the dramatic, brightly colored plumage that sets them ...

With over 400 miles of explored caverns and passages, Kentucky's Mammoth Cave National Park has plenty to offer the ...

Peek inside the burrow and discover a social rodent that lives in communities much like those of many insects.

The start of the Triassic period (and the Mesozoic era) was a desolate time in Earth's history. Something—a bout of violent ...

Forecasters say the region’s sea ice will dwindle to a strip above Greenland and Canada. There, polar bears and others will ...

Atlantic bluefin tunas have streamlined bodies built for speed and endurance. They can even retract their dorsal and pectoral ...

Soar into the world of flying fish. Find out how their amazing talents—that may be used to avoid predators—can sometimes get ...

The alligator gar bears no relation to alligators, but with its wide, crocodilian head and razor-sharp teeth, it’s easy to ...

They can be a life-threatening disaster—or a pricey nuisance. Here’s what you need to know about the depressions and holes ...

Explore the Mingan Archipelago’s many islands to see giant monoliths, secluded beaches, and whales and other marine life.