21 January 2015, 12:38 PM ET
The ominous hands of the Doomsday Clock have been fixed at 5 minutes to midnight for the past three years. But they could move tomorrow.
21 January 2015, 11:55 AM ET
Melting glaciers pose another threat beyond sea level rise. They will dump massive amounts of organic carbon into the world's oceans, altering ecosystems.
16 January 2015, 11:24 AM ET
Believed to be caused by increasing human contribution of carbon dioxide and heat-trapping gases, the steady increase in average temperatures peaked yet again in 2014. Since 2000, the record for warmest year has been broken 10 times.
16 January 2015, 11:10 AM ET
Global temperatures in 2014 shattered earlier records, making 2014 the hottest year since 1880.
16 January 2015, 12:42 AM ET
Today (Jan. 16), climate scientists are expected to announce that global temperatures in 2014 shattered earlier records, making 2014 the hottest year since 1880.
13 January 2015, 07:44 PM ET
Atmospheric CO2 levels have already passed the 400 ppm mark in 2015, and it's only January.
13 January 2015, 03:07 AM ET
How much carbon is being released from the warming Arctic tundra?
13 January 2015, 02:33 AM ET
Scientists are racing against climate change to determine the impact of thawing Arctic soils and the carbon released during that process.
09 January 2015, 08:03 AM ET
The Soil Moisture Active Passive satellite, planned to launch on Jan. 29, will improve drought tracking in the United States and around the world.
06 January 2015, 06:38 PM ET
Lake Erie's double ecological disasters may share a common ultimate cause, but they form under different conditions, a new study finds.
05 January 2015, 09:02 PM ET
The Japanese Meteorological Agency has released data showing 2014 was the globe's hottest year.
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, 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, 01:59 PM ET
The melting of Earth's polar ice came into starker relief in 2014, with real implications for sea level rise.
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.
20 December 2014, 12:01 PM ET
Ice melt in Greenland, disappearing reindeer and boulder-moving storms are just a few of the cool images this week.
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, 11:48 AM ET
The permafrost in most of Alaska's national parks could disappear by the year 2100, new research suggests.
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, 06:05 PM ET
New York City and its power grid is among the cities most sensitive to increasing hurricane intensity.
17 December 2014, 04:38 PM ET
Bad news for polar bears: the Arctic is still warming at twice the pace as the rest of the planet, according to a new federal report.
17 December 2014, 03:12 PM ET
A remote-controlled underwater robot has collected the most detailed information yet about the underbelly of stable Arctic sea ice.
17 December 2014, 09:28 AM ET
Life didn't immediately rebound after the world's greatest extinction, but cropped up in fits and starts.
16 December 2014, 12:49 PM ET
Regions of the world that experience extreme weather shifts due to climate change may become more vulnerable to the spread of cholera, scientists report.
16 December 2014, 12:16 PM ET
The vast ice sheet covering Greenland could melt more quickly in the future than existing models predict, new research suggests.
15 December 2014, 11:47 PM ET
Runaway global warming can't be stopped if developing nations don't have realistic options.
15 December 2014, 09:19 PM ET
Global warming is the gradual heating of Earth's surface, oceans and atmosphere.
15 December 2014, 11:20 AM ET
The Lima Accord set the framework for an unprecedented global pact to slow climate change.
13 December 2014, 01:41 AM ET
As ice melts, the world now has a chance to respond.
11 December 2014, 02:00 PM ET
New, more precise dates for India's Deccan Traps eruptions could revive the idea that the massive set of lava flows caused the Cretaceous-Tertiary (K-T) extinction.
10 December 2014, 01:28 AM ET
Research results will have implications for many other lakes in the U.S. and around the world that are also experiencing toxic blooms.
09 December 2014, 12:28 PM ET
Inbreeding, poaching, a lack of herders and climate change are contributing to the iconic animal's decline.
08 December 2014, 06:01 PM ET
Natural temperature swings in the ocean, not global warming, are driving California's extreme drought, according to a new government study.
05 December 2014, 04:59 PM ET
The 2012-2014 California drought is the worst to parch central and southern California in the past 1,200 years.
05 December 2014, 09:47 AM ET
California's rain shortfall isn't unprecedented, but its parched soils are. Researchers blame the heat.