Radioactive materials are found naturally in the Earth. But even so, saying an area is radioactive can conjure up images of ...

Chinese hydroelectric power plans in Tibet threaten to destabilize the Himalayan region’s ecology and politics.

A strong, 6.0-magnitude earthquake struck in Ethiopia on Friday, according to the United States Geological Survey. The ...

Venus, the Roman goddess of love and beauty, will gain "maximum brilliance" at night on Valentine's Day across Kentucky skies ...