Plot a mini-adventure in Italy's great outdoors — whether you want to swim around Sardinia or circle Lake Garda by bike.

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

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 ...

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.

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

And when he set out to explore Nova Scotia’s Cape Breton Island, a scenic, culturally diverse spot that joins the mainland by ...

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

Discover a seabird that’s as comfortable underwater as it is in midair. Learn what threats menace booby colonies around the ...