Friday, 22 Aug 2014 21:17 PM
A SpaceX rocket exploded in midair during a test flight Friday, though no one was injured, as the company seeks to devel . . .
Friday, 22 Aug 2014 13:14 PM
Deep in the southeastern part of the Mexican state of Campeche, the remnants of two ancient Mayan cities have been unear . . .
Friday, 22 Aug 2014 11:25 AM
A dry wash full of 112-million-year-old dinosaur tracks that include prints left behind by an ankylosaurus, dromaeosauru . . .