05 January 2015, 04:22 PM ET
It is a mystery why oxygen didn't suffuse the Earth's atmosphere until much after the earliest lifeforms that make oxygen arose. Now, new research suggests a reason for the delay.
05 January 2015, 06:48 AM ET
Two new U.S. research ships will take to the seas in the Arctic and Atlantic in 2015, allowing scientists around the world to explore the geology, biology and health of the oceans.
02 January 2015, 05:25 PM ET
The monarch butterfly, once common across the United States, could soon end up on the Endangered Species List.
02 January 2015, 12:34 PM ET
Scientists say the chance of every volcano erupting at once is so small that it's impossible, but what if it did happen? Would Earth as it now exists survive?
31 December 2014, 02:25 PM ET
In 2015, green might just be the new black.
31 December 2014, 09:09 AM ET
A new simulation predicts that relatively small asteroids could cause big waves on the U.S. coastline, but not everyone thinks the threat is real.
30 December 2014, 06:14 PM ET
A look at five places that will help push 2014 into the global warming record books.
30 December 2014, 02:52 PM ET
California and Nevada will feel an Arctic chill this week when wintry air from Canada arrives on New Year's Eve, possibly setting new record-cold temperatures as revelers ring in the New Year.
30 December 2014, 01:13 PM ET
Big climate news burbled out of the ocean in 2014. Most research findings were hot, but not pretty.
30 December 2014, 12:40 PM ET
A coyote hunter in Utah mistakenly shot and killed an endangered gray wolf, which wildlife groups worry was the same wolf photographed near the Grand Canyon this fall.
30 December 2014, 10:25 AM ET
Droughts in California may cause not only water shortages, but also conditions ripe for dangerous forest fires, landslides and poor water quality.
29 December 2014, 06:25 PM ET
The world's saltiest body of water, hidden away in a dry Antarctic valley, had its portrait taken earlier this year by a NASA satellite.
29 December 2014, 01:59 PM ET
The melting of Earth's polar ice came into starker relief in 2014, with real implications for sea level rise.
29 December 2014, 01:11 AM ET
Ten years ago we witnessed one of the worst natural disasters in history, when a huge earthquake off the coast of Sumatra triggered a devastating tsunami which swept across the Indian Ocean.
26 December 2014, 01:30 PM ET
The results of the most scientific study of cloud seeding done yet are in.
26 December 2014, 06:02 AM ET
As the 10th anniversary of the Indian Ocean tsunami approaches on Dec. 26, greatly expanded networks of seismic monitors and ocean buoys are on alert for the next killer wave.
24 December 2014, 12:43 PM ET
American suburbs light up during the holidays more brightly than inner cities, NASA found.
24 December 2014, 11:19 AM ET
Caltech professor Don Anderson died of cancer on Dec. 2, but he had the last word. Literally.
24 December 2014, 12:19 AM ET
It was our 14th expedition to the trenches of the Pacific Ocean, where depths can exceed 10,000m. And it was due to be our last for the foreseeable future.
23 December 2014, 12:12 PM ET
Find out the odds of a white Christmas for every location in the continental U.S., all on one map.
23 December 2014, 07:15 AM ET
Football, NASCAR and their rowdy, roaring crowds were pitted in a head-to-head battle this year to see which sport hits highest on the seismic charts.
22 December 2014, 09:23 PM ET
Since the late 1700s, the world's climate has been changing rapidly, mostly due to human causes.
22 December 2014, 06:57 AM ET
The "atmospheric rivers" that can bring torrential rains to Northern California will double in frequency by the year 2100 because of climate change, researchers say.
22 December 2014, 06:55 AM ET
Greenland's disappearing ice shifted gears in the past decade, switching from shrinking glaciers to surface melting, researchers reported at the American Geophysical Union's annual meeting.
19 December 2014, 11:20 AM ET
Near-Earth objects about the size of the Chelyabinsk meteor shower could potentially be detected by their interaction with solar wind as they travel through space.
19 December 2014, 10:24 AM ET
Boulders the size of stretch limousines were moved by storm waves during Super Typhoon Haiyan.
18 December 2014, 04:57 PM ET
NASA scientists unveiled the first data sets from the Orbiting Carbon Observatory-2, or OCO-2.
18 December 2014, 02:26 PM ET
Despite a high human population density, Europe is seeing a resurgence of large carnivores such as wolves, lynx, bears and wolverines.
18 December 2014, 11:48 AM ET
The permafrost in most of Alaska's national parks could disappear by the year 2100, new research suggests.
18 December 2014, 07:23 AM ET
This is the time of year when hanging mistletoe beckons loving couples to share a romantic moment. But, in the desert regions of northern Mexico and in the American Southwest, a very different type of mistletoe can be found.
17 December 2014, 11:15 PM ET
The consequences of global warming are expected to be far-reaching, long-lasting and, in many cases, devastating.
17 December 2014, 10:39 PM ET
About 300 million years ago, all the seven continents formed one massive supercontinent called Pangaea.