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

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

Since the outset of the Quaternary, whales and sharks have ruled the seas, topping a food chain with otters, seals, dugongs, ...

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

See nature images of lightning, sunsets, Samburu elephants, colorful frogs, a bold ladybug, and download wallpapers from ...

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

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

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.

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