Scientists are studying a fascinating image of an unusual circular formation on Mars and trying to work out how it got there.
For years now, Crave's Eric Mack has been telling the story of the UFO he saw over a decade ago. Turns out he's probably had it all wrong that whole time.
In an age of social media and renewed interest in space exploration, 2014 has been a good year for speculative alien and UFO spotting. Crave's Eric Mack has some of the year's craziest "evidence."
The discovery of a new unusually bright dead star leads astronomers to question assumptions about a type of cosmic radiation -- and pulsars themselves.
Space-alien theorists have gotten a thrill from a bone-like object found on Mars, but NASA has a more plausible explanation.
If you see a killer robot (including one that looks like a certain former California governor) making threatening movements toward Google's founders, there's no need to worry.
Join CNET for coverage from T-Mobile's event, which starts at 6 p.m. PT on Wednesday. Our live blog will bring you news updates, photos, and running commentary.
We could see physical matter created out of nothing but light within 12 months if a new particle collider works as posited.
Alien pyramid-building theories take a blow as a new study shows Egyptians may have used water to help move the massive stones.
Why buy a health tracker? Why not. Facebook is such a well-oiled machine that its CEO can toy around with apps outside the social network's comfort zone.