Most of our experience with the Search for Extraterrestrial Intelligence (SETI) has focused on capturing radio signals that alien species have sent out, whether intentionally or unintentionally. That ...

This file argues that the biggest obstacle in the alien debate may no longer be the total lack of evidence, but the impossible standard for what counts as final proof. From the Wow! signal to Martian ...

The moon may be wearing a dusting of alien junk, and a group of researchers wants to go looking for it. In a new study that's under peer review for the International Journal of Astrobiology, ...