In my former life, I studied paleoclimatology (the variability in Earth’s climate over time) and earned a master’s degree in geology. I later worked for a green nonprofit where I spent a few years ...

The concentration of carbon dioxide in Earth's atmosphere has reached a record 430.2 parts per million (ppm) - a level ...

The last time a President deployed the National Guard to a state over the objections of the governor was in 1965, when LBJ sent them to protect Civil Rights marchers in Selma in defiance of Alabama ...

Captured by NASA's 2001 Mars Odyssey orbiter, the stunning panoramic photo shows Arsia Mons rising above early morning clouds. It's the first time a Martian volcano has been photographed on the ...