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.
It was once believed that mice had relatively poor vision. Turns out mice are far from blind - and studying how their vision is shaped by their environment and behavior can clarify the same in people.
The closer to Earth a satellite flies, the clearer a picture it can take of the surface. But low-flying satellites also have to deal with atmospheric drag.
US Sen. Mark Kelly correctly articulated military law when he said service members have a duty to not obey unlawful orders, according to a military law scholar.