Learn about Earth's biodiversity and natural resources. Plus: Explore national parks and state wilderness areas.
Still not for the faint of heart, Hua Shan, one of the steepest mountains in Asia, is now safer to climb.
Spinosaurus is the only known dinosaur adapted to living almost entirely in the water.
The ancient flying reptile known as the pterosaur may have stored food in a throat pouch like a pelican.
Take a tour of the world's most fiery destinations, many of which have been burning continuously for decades, even centuries.
The cloud-strewn sky and flower-covered mountainside seem to mirror each other in this gorgeous sunrise landscape photo.
If you found yourself stranded in a desert with minimal supplies, do you have the skills to make it out alive? Test your knowledge with this quiz!
Nearly 170 years after 2 British ships went missing, 1 of them has been found, thanks to sonar images.
The world's most famous ring of standing stones has been studied for centuries, yet we learn something new about it all the time.
The sea has a dead zone the size of Texas, and it's growing bigger every year because of sewage and fertilizer flowing into the waters.
The tornado over the Holuhraun lava flow was likely a spinning ribbon of sulfur dioxide gas.
Take a peek at one of Georgia's most fascinating yet obscure natural treasures.
The water level of Austria's Green Lake can fluctuate by 30 feet over the course of a year. Find out why the lake has become a new hotspot for scuba divers.
A new video shows lava from the Kilauea volcano burning through forest on its way toward a neighborhood.
These stunning falls are all the more impressive since they tumble over a river bed in an otherwise arid region between Namibia and Angola.
A picture speaks a thousand words but this quote from John Muir does a pretty great job of summing this up.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.