Birds are migrating earlier as global temperatures rise
January 4, 2017, 11:41 a.m. by Jaymi Heimbuch
A new study shows that birds are arriving at breeding grounds earlier — and potentially missing out on food.
Carbon dioxide in Earth's atmosphere just reached a major milestone
September 29, 2016, 9:36 a.m. by Russell McLendon
CO2 data from Mauna Loa in Hawaii suggest 400 ppm is the new normal.
Extinct smallpox virus could be resurrected by global warming
August 22, 2016, 1:11 a.m. by Bryan Nelson
Melting permafrost threatens to exhume a smallpox graveyard in Siberia, and it could be a sign of what's to come.
What are megaslumps, and how do they threaten our planet?
June 9, 2016, 2:23 a.m. by Bryan Nelson
So-called 'gateways to the underworld' opening up across the Arctic are an ominous consequence of global warming.
As U.N. makes history on Earth Day, Leonardo DiCaprio reminds us not to rest on laurels
April 22, 2016, 2:31 p.m. by Russell McLendon
More than 170 world leaders signed the Paris Agreement on Earth Day 2016, but that's just the beginning.
Could cleaner air be worsening global warming?
December 28, 2015, 12:33 p.m. by Tia Ghose, LiveScience
Warming trends have spiked in certain areas of the world as they battle against smog.