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

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

In the 1960s, NASA needed to prepare astronauts for walking on the moon's surface, so it searched for the most lunar-like landscape on Earth. When they found it, it seemed almost unbelievable that ...