Brian Kahn

One of the oldest oak trees in the U.S. was dealt a death blow by extreme heat this summer.

Carbon dioxide just hit its annual minimum at Mauna Loa Observatory and failed to dip below 400 ppm.

The U.S intelligence community also released the first unclassified report that explicitly looks at the impact of climate change on national security.

Yellow cedars are dying in Alaska and researchers have turned the data showing their demise into music.

Randall Munroe, creator of the tri-weekly web comic xkcd, has created a comic that shows just how radical the recent changes are and puts to bed the trope “the climate has changed before.”

Carbon dioxide passed a notable symbolic threshold in Antarctic for the first time in 4 million years.

Stunning new maps document a global year in the clouds in more intimate detail than ever before.

The vast majority of the world's largest reef ecosystem has been ravaged by coral bleaching.

By melting the planet's ice, climate change is causing Earth's poles to drift. What's next?

Climate change could spell bad news for the maple syrup on your pancakes.

January continues a streak of abnormally hot months as 2016 picks up right where 2015 left off.

Tasmania's rainforest is burning up in the wake of its most severe two-year drought on record.

From record heat to the Pope's climate push to Paris, these are the climate stories that shaped 2015.

For only the third time on record, coral bleaching is occurring across the globe and climate change is to blame.

There's a 97 percent chance the planet is going to have its hottest year on record.

The global warming hiatus — a decade-plus slowdown in warming — could be chalked up to some buoys, a few extra years of data and a couple buckets of seawater.

Geoengineering offers solutions and risks but reducing emissions is still the best way to address climate change.

The Japanese Meteorological Agency has released data showing 2014 was the globe's hottest year.

For the third month in a row, global temperatures were in record high territory according to NASA.

This was a warm October for the U.S. and the first month since July 2013 no state was cooler than normal.