Mars has never looked more like a planet built for hiding secrets. A cluster of eight vast, water-carved caves appears almost engineered to shield fragile chemistry, or even biology, from the brutal ...

The past 12 months have read like a science-fiction novel, with thousands of UFOs swarming over the US East Coast, an ...

AN abandoned RAF site dubbed Britain’s ‘Area 51’ is a magnet for UFO hunters, urban explorers and conspiracy theorists who ...

"Star Trek" is home to countless alien species, many of whom offer beloved characters. Some are not. We rank the 10 most disturbing alien races in the galaxy.