16 April 2014, 02:27 AM ET
You can learn a lot about volcanoes by studying explosions. The more we can learn about their explosive behaviour, the more chance we have of saving lives when they suddenly erupt.
15 April 2014, 01:31 PM ET
A fire ravaging the scenic city of Valparaiso, Chile, is visible from satellite on April 13, 2014. So far, 15 people have died in the fire, and thousands of homes have been destroyed.
15 April 2014, 12:48 PM ET
his month, you can fly along the Gulf of Mexico seafloor and explore an ecosystem fueled by chemicals instead of sunlight, all from the comfort of home.
14 April 2014, 06:58 PM ET
A single bacterial strain may help researchers better understand the processes of global carbon cycling.
14 April 2014, 03:12 PM ET
In a new image taken by astronauts on the International Space Station, the Grand Canyon stretches across the Colorado Plateau. Entrance to the National Park is free this weekend, April 19 and 20, 2014.
14 April 2014, 03:00 PM ET
The worldwide ban on ozone-depleting chemicals stopped Arctic ozone from disappearing and forming an "ozone hole" similar in size to Antarctica's, a new study finds.
14 April 2014, 03:00 PM ET
Pollution from China's coal-burning power plants is pumping up winter storms over the northwest Pacific Ocean and changing North America's weather, a new study finds.
14 April 2014, 02:15 PM ET
Rare night-shining clouds that glow across the edge of space tend to appear near Earth's poles. But since the turn of the century, these silvery clouds have become more frequent sights over lower latitudes, new research finds.
14 April 2014, 10:58 AM ET
The mystery of the giant pile of boulders that a Moroccan village now rests on has been solved; they are the result of a huge, catastrophic rock fall that occurred 4,500 years ago in the Atlas Mountains.
12 April 2014, 09:52 AM ET
An expedition to the Kermadec Trench, one of Earth's coldest, deepest ocean trenches, is scheduled to start today (April 12).
11 April 2014, 05:32 PM ET
An earthquake of magnitude 6.6 shook Nicaragua Friday (April 11), according to the U.S. Geological Survey (USGS).
11 April 2014, 05:30 PM ET
Researchers have embarked on an effort to revitalize the Colorado River delta.
11 April 2014, 03:19 PM ET
When the sun heats water in the oceans, rivers, lakes and other sources, some of it evaporates, or transforms from liquid water to water vapor. This is the first step in cloud formation.
11 April 2014, 01:06 PM ET
Rising temperatures are affecting the size of salamanders in the Appalachian Mountains.
11 April 2014, 11:56 AM ET
Scientists plan to explore one of Earth's coldest, deepest ocean trenches starting Saturday, the first stop in a three-year examination of the ocean's most mysterious depths.
11 April 2014, 11:50 AM ET
An earthquake of magnitude 6.1 shook Nicaragua Thursday (April 10), according to the U.S. Geological Survey (USGS).
10 April 2014, 09:29 PM ET
Wind power is now big business in the US, and it is getting bigger.
10 April 2014, 06:31 PM ET
Oversized-load vehicles were blocked from traveling through wild and scenic river Route 12 in Idaho by court order. Oil field equipment movers were using this route to reach the Tar Sands development in Alberta, Canada. This American Land reports.
10 April 2014, 05:28 PM ET
U.K. researchers have sunk a long-standing explanation for the loss of the Titanic — that the fateful journey took place in waters bristling with icebergs, making 1912 an unlucky year to sail the North Atlantic.
10 April 2014, 11:46 AM ET
A severe tropical cyclone with winds equivalent to a Category 5 hurricane will hit the northeastern coast of Australia tonight.
10 April 2014, 02:31 AM ET
After a toxic chemical leaked into a West Virginia river this year, threatening 300,000 residents, you would think Congress would act to restrict such substances — but the opposite is happening.
09 April 2014, 08:14 PM ET
Fossilized bee pupae found in the La Brea Tar Pits in Los Angeles suggest the region experienced a very moist period during the Ice Age, a new study says.
09 April 2014, 04:19 PM ET
It's the size of a golf ball, but a lot more valuable: Scientists at Los Alamos National Laboratory have now verified that a heavy piece of gold, found decades ago in Venezuela, is in fact a single crystal of the valuable element.
09 April 2014, 03:08 PM ET
A new crayfish, Gramastacus lacus, discovered in southeast Australia's coastal lakes is one of the world's smallest examples of the species.
09 April 2014, 01:22 PM ET
09 April 2014, 10:19 AM ET
California's San Joaquin River is the most endangered river in the country, according to nonprofit American Rivers. The river faces important management decisions this year that could determine its future in the face of heavy demands and drought.
09 April 2014, 07:01 AM ET
The nonprofit American Rivers has highlighted the 10 most endangered rivers in the United States. California's San Joaquin is ranked No. 1, with rivers in South Carolina, North Carolina and Idaho also appearing on the list.
09 April 2014, 12:01 AM ET
The San Joaquin River is the most endangered river in America, according to a 2014 report by the nonprofit American Rivers. Excess diversions threaten to run even more of the river dry.
08 April 2014, 12:33 PM ET
Wild winds stirring up choppy waves behind the Canary Islands grabbed the top spot in NASA's annual Tournament Earth photo competition.
07 April 2014, 05:17 PM ET
An earthquake of preliminary magnitude 5.0 shook southern France today (April 7), according to France's National Seismic Monitoring Network.
07 April 2014, 04:41 PM ET
Arctic sea ice hit its annual peak on March 21. It was the fifth-lowest maximum extent since 1979.
07 April 2014, 02:55 PM ET
Photographer Rachel Sussman traveled the planet for a decade in search of organisms that have witnessed thousands of years of history. Her stunning images are featured in a new book, "The Oldest Living Things in the World."
07 April 2014, 02:26 PM ET
An extinct marine predator entombed in a seafloor "Pompeii" for 520 million years had a sophisticated heart and blood vessel system similar to those of its distant modern relatives, arthropods such as spiders, lobsters and millipedes.
07 April 2014, 02:09 PM ET
Photographer Rachel Sussman traveled the planet in search of organisms that have been living for 2,000 years or more, compiling images for her book, "The Oldest Living Things in the World."
07 April 2014, 01:20 PM ET
An earthquake of preliminary magnitude 4.0 struck Oklahoma today, according to the U.S. Geological Survey. Scientists think fracking-related wastewater injection is to blame for the state's uptick in seismic activity.
07 April 2014, 11:57 AM ET
A massive volcano in Ecuador erupted Friday, shooting a massive cloud of ash several miles into the air.