Environmental Protection Agency to review a key 2009 finding by the agency that greenhouse gases pose a risk to Americans.

Collisions are a growing risk as space gets more crowded, and greenhouse gas emissions could make things worse. Greenhouse ...

Greenhouse gases are eroding the safe carrying capacity for low Earth orbit, a new study concludes. Moreover, the authors ...

Across the street from the Flamingo Visitor Center at the foot of Florida's Everglades National Park, there was once a ...