Wildfire smoke is killing Americans. A new study quantifies how much More intense future wildfires, fueled by further climate change, could lead to 70,000 deaths from smoke exposure a year, according to a new study. Alejandra Borunda
Movie star and visionary Robert Redford has died at age 89 A movie star to his core, Robert Redford has died after a visionary career in cinema, including founding the Sundance Institute that transformed the market for independent films. Neda Ulaby
Melting glaciers mean an uncertain future for Europe's rivers Europe is warming faster than any continent. That's speeding up glacial melt, which is already threatening Europe's largest rivers. Rob Schmitz
How free-roaming bison in Yellowstone National Park are reshaping the ecosystem It's not always for the better.
By listening to these birds for decades, scientists track signs of a changing forest Scientists tracking the birds in an experimental forest in New Hampshire have also tracked changes in the forest ecosystem over decades. Ari Daniel
The world's oldest and largest iceberg will soon be no more The iceberg, known as A23a, has been on a journey following the current into warmer waters for months. Now, it has begun the predicted and natural process of breaking apart, and eventually melting. Kat Lonsdorf
How free-ranging bison are reshaping Yellowstone's grasslands A new study finds free roaming bison in Yellowstone National Park are reshaping the ecosystem. They have had a positive effect on grasses and soil, but some changes may not be for the better. Nathan Rott
Historians find one of the oldest apple trees in North America The tree is on an island off of Maine's coast.
How Europe's disappearing glaciers could change the continent's rivers Europe's Glaciers may disappear by the end of the century.
