The nature of space, time and the evolution of life on Earth mean it’s unlikely extraterrestrial life has visited our home ...

The buzz about aliens began in the summer of 1947. The US army sightings of “flying saucers” fuelled widespread speculations about visiting aliens, urging the US to launch its first highly classified ...

Add Yahoo as a preferred source to see more of our stories on Google. Chinese scientists' claims that their "Sky Eye" telescope could have picked up signals from intelligent aliens have been met with ...

The scientific wonderers at What If look for chemical signatures and radio signals that might prove a neighbor star hosts a technologically advanced race. Justice Department reaches $1.25 million ...

A new study suggests that if alien civilizations have been sending signals our way, we probably would've needed an unrealistically huge number of them just to catch one. The research, led by physicist ...

If advanced aliens lived on a planet within a few hundred to a thousand light years away from Earth, then vast numbers of their signals must already have crossed Earth without being noticed, a new ...

The first alien signal humanity detects might not come from a thriving civilization, but rather from one in decline, possibly sending a cry for help. That’s the central idea behind a new paper by ...

Mysterious red lights falling from space, initially thought to be alien signals, have been identified by scientists as red sprites. These rare upper-atmosphere lightning phenomena occur high above ...

Where is everybody? The great physicist Enrico Fermi first posed the challenging question over half a century ago, wondering why we appear to be alone in the universe. Perhaps the most straightforward ...

Are we alone in the universe? How can we discover if we share the universe with other intelligent beings? These questions have long pricked the human imagination. We are now searching our own solar ...