A billionaire spacewalker returned to Earth with his crew on Sunday, ending a five-day trip that lifted them higher than anyone has traveled since NASA’s moonwalkers.

Ranking the best movie dogs ever, from Lassie, Toto, and Rin Tin Tin to Hooch, Snoop, and the newcomer Great Dane from 'The ...

This week, researchers reported on nine rivers and lakes in the Americas that defy hydrologic expectations. Geologists report ...

Ronald Mallett, professor emeritus at the University of Connecticut, is most known for his theory on how time travel is ...