Learn about Earth's biodiversity and natural resources. Plus: Explore national parks and state wilderness areas.
Check out how it looks to plunge headlong down one of the gnarliest mountain bike race courses in the world.
Scientists used to think that fairy circles were made by termites, but new research suggests otherwise.
Sandy debris pulled up from icebergs sugget that Antarctica's giant glaciers respond to a warming climate with pulses of quick withdrawal as opposed to a gradual retreat.
The new findings may help scientists to explain why sea ice levels fluctuate from year to year.
A single-celled, coral-killing creature with 'devil horns' has been found on microplastics in the open ocean.
The craggy slopes of Oak Creek Canyon near Sedona are enveloped by smoke and flames from Arizona's Slide Wildfire.
Check out the crazy way one band of merry Russians spent an afternoon.
Around the globe, islands preserve habitats for a wealth of unique plants and animals on land and in the water.
For scientists, these dark ocean finds indicate that creatures from the deep played a significant role in marine biodiversity.
The Colorado River connecting with the gulf marked the end of a nearly two month effort to moisten the river's parched delta.
When the United Way of Cleveland released more than a million helium balloons into the sky as part of a fundraiser, things did not quite go according to plan.
Quake experts are worried about a string of 'closely timed earthquakes' causing havoc in a major city like San Francisco.
The 95 million-year-old herbivore sauropod was about 131 feet long and weighed 80 tons — even larger than its titanosaur cousins, including Argentinosaurus.
Not only can coral reefs buffer humans from disasters, but protecting them is 15 times cheaper than building sea walls.
Dusk falls upon Vietnam's Red River Delta in this beautiful photo.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.