Stratospheric polar vortex changes still trigger brutal U.S. winter cold snaps and extreme weather despite a warming climate.

The multilateral system is the best we've got. There is no other system that can help us to deal with our global problems,” says Bob Rae, President of the Economic and Social Council and Permanent ...

Roughly 252 million years ago, Earth experienced its deadliest known extinction. Known as the Permian–Triassic Mass ...