Wildfires burning large swaths of Russia are generating so much smoke, they're visible from space, new images from NASA's Earth Observatory reveal.
A bare-chested Amazonian tribesman sniffs a machete, looks toward the camera and then disappears into the foliage.
"We know what's happening and what needs to be done," the haunting letter to the future reads. "Only you know if we did it."
Earth's scorching core is not a loner — it has been caught mingling with other, underworldly layers.
More than 80% of California's iconic Joshua trees are likely to die at the hands of drought and fire over the next 50 years — but there's still time to save them from extinction.
Radioactivity still lingers more than 60 years after atomic weapons, including the hydrogen bomb, were tested in the Marshall Islands.
A concentration of plasma in the Earth's atmosphere, called the ionosphere, interacts with solar winds, ultraviolet radiation and radio waves.
Greenland's ice sheet is sliding way more than previously thought, making it more vulnerable to a warming climate, according to a new study.
Barry is now packing winds of 75 mph. Life-threatening flash flooding will become increasingly likely later today and tonight as Barry moves inland.
Was the planet ever as hot as it is today, when every month the globe seems to be breaking one high-temperature record after another?
The world's largest iceberg turned 2 years old today (July 12) and has already drifted more than 150 miles from its Antarctic home.
New Orleans is bracing for a tropical storm that is expected to hit tonight or tomorrow, bringing with it chances of intense flooding.
A mud-volcano island that burst from the waters off the coast of Pakistan during a deadly earthquake in 2013 has disappeared beneath the waves.
Japanese satellite shows where the ground was broken up and even sliced open during the twin earthquakes near Ridgecrest.
Back in 2013, Tamu Massif -- a giant underwater volcano off the coast of Japan -- stole Hawaii's crown as the largest single volcano in the world. But it's not a true volcano at all.
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