Scientists say extraterrestrial life may exist elsewhere in the universe, but vast distances, enormous energy requirements ...

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

Asked when they humans will likely have contact with extraterrestrials, an eye-popping 21% said, “We already have,” according ...

To travel between solar systems, a spacecraft would need extremely sophisticated – if not impossible – technology.

Humans should look to planetary alignments outside of the solar system when searching for signatures of extraterrestrial communications, scientists say. The nascent search for radio transmissions from ...

Astronomer Jon Willis warns that alien signals could be passing Earth unnoticed because humans are searching on the wrong ...

Here's what you'll learn when you read this story: Even the most sophisticated radio arrays have not yet detected any signals that could have possibly been beamed through space by aliens. But maybe we ...

Add Yahoo as a preferred source to see more of our stories on Google. The Search for Extraterrestrial Intelligence (SETI) focuses on finding technosignatures—potential signs of alien technology. If we ...

Aliens could, in theory, reach Earth but would never truly go home again, according to physicists who say Einstein's laws of ...