R.F. Kuang and Olivie Blake get existential in new short stories collection "The Time Traveler's Passport." We ask them where ...

The ESCAPADE mission, short for Escape and Plasma Acceleration and Dynamics Explorers, is the first dual-satellite mission to ...

The ESCAPADE mission, short for Escape and Plasma Acceleration and Dynamics Explorers, is the first dual-satellite mission to another planet. Two identical spacecraft will orbit in formation to ...

Time travel paradoxes like the grandfather problem and causal loops show how the universe may resist changes or trap actions in endless cycles.

Researchers say they've proven that the fundamental nature of reality simply cannot be simulated on any computer.

Kevin Thomas and Steve Concotelli are the proud owners of one of the most famous vehicles in Hollywood history: The time ...