New research shows the blast triggered secondary gravity waves that rattled the upper atmosphere, where satellites orbit.

For ages, Earth has been known as a blue planet, a vision largely shaped by the vast oceans that cover three-quarters of its ...

Borderland State Park lets you play lord or lady of the manor for a day. This 1,800-acre former estate centers around the impressive Ames Mansion, a 20-room stone masterpiece built in the early 1900s.