Thousands of people lined both sides of the railroad tracks as they took photos of the Big Boy locomotive in Greeley on Wednesday.

Few chess players enjoy Magnus Carlsen's celebrity status. A grand master at 13, refusing to play an American dogged by ...

On a mountaintop in northern Chile, the Vera C. Rubin Observatory, which holds the largest digital camera in the world, is ...

The human species is ever-changing and so is our view of the universe. By Jeffrey Kluger It’s easy to laugh at the ancient humans who thought of the nighttime sky as a sort of cosmic colander ...