For generations, artists and science-fiction writers have imagined alien landscapes beneath twin sunsets. The image became ...

Billions of years ago, another planet smashed into Earth. An event of this epicness could have created our Moon. It also ...

With the release of Disclosure Day, Steven Spielberg’s new film about aliens, a question as old as science fiction itself ...

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life.