Could the first confirmed signal from an extraterrestrial source be less a hello than a goodbye? Astrophysicist David Kipping argues as much, and his “Eschatian Hypothesis” reimagines the way ...

We live in a very exciting time: answers to some of the oldest questions humanity has conceived are within our grasp. One of ...

The United States is stepping back from the most direct test yet of possible alien biology on Mars just as new telescopes and ...