10 June 2014, 04:30 AM ET
Various explanations for why we don’t see aliens have been proposed but with every new discovery of a potentially habitable planet, the Fermi Paradox becomes increasingly mysterious.
07 June 2014, 02:37 AM ET
If people choose not to "believe" in a reality as documented as the Holocaust, should society be surprised that there is debate about the established facts of science?
07 June 2014, 01:16 AM ET
Is "fight or flight" the right response for a warming climate?
06 June 2014, 03:32 PM ET
A late fall warm spell in Australia extends a period of record warmth influenced by global warming.
06 June 2014, 02:32 PM ET
An amazing new video shows Arctic life from a polar bear's point of view.
05 June 2014, 07:25 PM ET
San Francisco-based company Carbon Lighthouse discusses how they take money-guzzling/power-hungry buildings and turn them into energy efficient/cost-saving structures.
02 June 2014, 04:43 PM ET
Even a weak El Niño could hike global temperatures to record levels this year and into 2015.
29 May 2014, 02:00 PM ET
One of the world's great coral reef regions protected fish from the ravages of climate change for the past 3 million years.
29 May 2014, 01:49 AM ET
Desmond Tutu is joining with students and others to apply anti-apartheid tactics to climate-harming industries.
28 May 2014, 02:06 PM ET
Scientists are closely tracking Greenland's 2014 summer thaw to see if it will repeat 2012's impressive meltdown, or return to a more mundane trend.
28 May 2014, 01:03 PM ET
Natural climate warming caused huge ice sheet collapses in Antarctica eight times in the past 20,000 years. One iceberg release pushed global sea level up by 6.5 feet (2 meters) in just 100 years.
28 May 2014, 12:41 PM ET
Few other places in the West exemplify the changes brought about by climate change more than the Navajo Nation.
28 May 2014, 04:19 AM ET
As Antarctic ice collapses, there are impacts beyond global climate
27 May 2014, 01:06 PM ET
Americans are more concerned and motivated to act when they hear about "global warming," versus "climate change," even though scientists prefer the latter term for technical reasons, new research finds.
23 May 2014, 12:25 AM ET
Scientific studies in recent weeks revealed the "climate change hypothetical" is real.
22 May 2014, 08:36 AM ET
Pat Sajak, the longtime host of "Wheel of Fortune," set off a social media firestorm earlier this week when he took to Twitter to call people who believe in climate change "alarmists" and "unpatriotic racists."
21 May 2014, 01:57 PM ET
It's time for deniers of human-caused global warming to stop using an old magazine story as ammunition against the consensus of today's climate scientists.
20 May 2014, 10:54 PM ET
A new report looks at the U.S. cultural heritage sites most threatened by rising seas, wildfires, and storms.
20 May 2014, 04:52 PM ET
Last month ranked as the world's hottest April on record, tying with April 2010, U.S. weather officials said. Last month was 1.39 degrees Fahrenheit (0.77 degrees Celsius) warmer than the 20th century average.
20 May 2014, 04:48 PM ET
Last month tied as the hottest April on record according to new NOAA data released Tuesday.
19 May 2014, 03:00 PM ET
Ash kicked Greenland's annual summer melt into overdrive in summer 2012. Without the boost from forest fire ash, warm summer temperatures couldn't have melted Greenland's surface ice in 2012.
19 May 2014, 02:17 PM ET
The below sea-level canyons beneath the ocean-feeding glacier cut further inland than previously estimates. Accelerated ice loss of the glacier was thought to be limited, but this finding calls into question its duration.
18 May 2014, 01:00 PM ET
The decline of Greenland's glaciers could be more spectacular than predicted, because its valleys run longer and deeper than ever thought.
16 May 2014, 01:04 PM ET
"We are a coastal country," says National Climate Assessment's Coasts chapter's Susanne C. Moser, with 94,000 miles of coastline and more than $1 trillion in coastal infrastructure and all are increasingly vulnerable.
15 May 2014, 08:23 PM ET
Coral reefs are an amazingly effective first line of defense for coastal communities.
15 May 2014, 02:47 PM ET
"The story in the Southwest is the story of water." says National Climate Assessment Southwest chapter's Gregg Garfin. Reduced agricultural yields, health impacts in cities due to heat, and flooding in coastal areas are additional concerns
14 May 2014, 04:06 PM ET
According to the National Climate Assessment, oceans currently absorb about a quarter of human-caused carbon dioxide emissions to the atmosphere, leading to ocean acidification that will alter marine ecosystems in dramatic yet uncertain ways.
14 May 2014, 01:00 PM ET
Hurricanes and typhoons are migrating from the tropics toward the poles, a new study finds.
14 May 2014, 12:33 PM ET
"Climate change, once considered an issue for a distant future, has moved firmly into the present" - The 2014 National Climate Assessment provides an in-depth look at climate change impacts in the United States.
14 May 2014, 12:26 PM ET
In 2011, many places in Texas and Oklahoma recorded more than 100 days over 100 degrees. Heat and drought contributed to more than $10 billion in agricultural losses alone. "Communities are drying up", Texas rancher Kevin Igo says.
14 May 2014, 11:38 AM ET
According to the 2014 National Climate Assessment, higher average temperatures are drying out forests fuels, increasing the vulnerability of western forests to more wildfire. "Climate change is very real," Elk Creek, CO Fire Chief McLaughlin says.
13 May 2014, 05:07 PM ET
Live Science explains the reality behind some common misconceptions about big changes in Antarctica.
13 May 2014, 02:41 PM ET
The spring melt of Arctic sea ice is underway, but what summer's minimum will be is hard to predict.
12 May 2014, 02:03 PM ET
The catastrophic collapse of the massive West Antarctic Ice Sheet is underway, researchers said today.
12 May 2014, 12:53 PM ET
After 40 years of observation, NASA and University of California researchers agree that melting of the West Antarctic Glacier has passed the point of no return. It contains enough ice to raise sea levels ~4 feet, but could take centuries to melt.
12 May 2014, 09:55 AM ET
NASA is hosting a media teleconference today (May 12) to announce new findings from the ever-changing West Antarctic Ice Sheet, and you can watch the announcement live online.