A picture of what West Antarctica looked like when its ice sheet melted in the past can offer insight into the continent's future as the climate warms.
Real skeptics study the evidence and ask questions, rather than taking political dogma on faith. Experiencing disasters can open more eyes to the risks.
The 20th anniversary of the annual report tracks how sea ice, snow cover and many other vital signs of the Arctic have changed, and the impact that's having on people and wildlife.
There are actually two North Poles. One has been wandering over northern Canada and north of there for years. An earth scientist explains why and what it means for holiday travel.
Sharks have had a tough time since the 1970s, when overfishing, habitat loss and a growing trade in their fins began to cut their populations. 'Jaws' didn't help.