Gravity — yes, gravity — is the latest victim of climate change in Antarctica.
A megafire broke out this week along Alaska's southern coast, which could be a sign of what's to come for the warming state.
The U.S. military is preparing for conflict, retired Navy Rear Adm. David Titley says in an interview.
A surprisingly hopeful story -- with tweets!
An uncommonly sharp kink in the jet stream is partly responsible for plunging more than half of the United States into the freeze.