It's certainly not a small island: It's about three times the size of Texas. But on most maps, Greenland looks almost as big as the entire continent of Africa. In fact, it's 14 times smaller than ...

Given the increasing importance of rare earths, countries with large reserves are gaining significant economic and political influence.

Thorium, an abundant and safer alternative to uranium, could soon become a vital resource in the quest to meet energy needs.

Travel to the Canadian Arctic to see how climate change is impacting the Inukjuak community's way of life. Plus, Philly ...