Learn about Earth's biodiversity and natural resources. Plus: Explore national parks and state wilderness areas.
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.
National Geographic marks the 50th anniversary of the Wilderness Act with these gorgeous images.
We had an outstanding month with reader-submitted photos, and these ten images stood out as favorites.
The Netflix original film about Sylvia Earle serves as both homage to a champion of the seas as well as a plea for the rest of us to step up.
Isaiah Cooper's Vines bring snippets of Appalachian Trail life, customs and scenery to his 50K followers.
Paleo-Eskimos likely survived in near-total isolation for thousands of years and did not pass on genes to Neo-Eskimos or Native Americans.
If the pace of past growth is anything to go by, much of the Southeast could become one big megalopolis in the next 50 years.
In keeping with being a weird place, Death Valley's roaming rocks involve ice in the desert.
Learn more about this hidden gem located in the middle of Utah's San Rafael Desert.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.