Stories by Brian Kahn

A new animation, the "Temperature Circle," shows every nation on the planet is now in the red

Grasses and low vegetation on the defrosting, drying tundra are igniting 

The berg has now traveled about 1.5 miles from where it broke off

Carbon dioxide has not reached this height in millions of years

The changes are already visible in the region, which has had largely ice-free summers since 2011

Out of 1,500 weather stations across the U.S., 84 percent had a winter that was hotter than normal

The largest solar farm in the world, in China, generates almost as much electricity as a large nuclear power plant

Federal climate plans created under the former president, tribal assistance programs and references to international cooperation have been stricken from the EPA’s Web site

Rally backing evidence-based policies planned for April 22 in Washington, D.C., with supporting events around the country  

In just two days, more than 300,000 people join a Facebook planning group

Agency says “high-definition from the heavens” could dramatically improve weather forecasts

"Near-term politics aside" President expresses confidence that shift toward low-carbon fuels will continue

Freakishly warm pole weather is likely to peak on Christmas Eve 

Scores of homes are gone and up to 2,000 people have been evacuated to emergency shelters

Departments like the EPA and NASA could see a dramatic shift in their funding and priorities

Instead of expanding during this cold, dark time of year, sea ice is shrinking

Undergraduates and new professors weigh in on starting their careers at an odd time

Eight worrisome climate patterns are well underway, regardless of politics

An unsettling visualization shows the relentless advance of the greenhouse gas  

Carbon dioxide levels often hit lows in September, but now remain above a crucial benchmark  

Data, turned into music, reveals an odd scenario: death by freezing, in a warming world

Quick read captures 22,000 years of glaciers, heat and humans

The startling dip below 400 parts per million will likely be short-lived after the blast of fresh, northern air

Temperature is mapped worldwide for every year from 1950 to 2016, showing startling change over time