Kepler-22b is now of the our best candidates for extraterrestrial life. But there are a lot of questions left to answer about this planet.

Gliese 581d, one of the exoplanets considered potential homes for alien creatures seems to show even more promise on further investigation.

Could an alien civilization set up a way to communicate with us more visually than just sending a laser or microwave broadcast?

Could advanced alien civilizations turn to artificial black holes to meet their energy needs? And could we detect the emissions from their maws when they feed?

The Pope's astronomer thinks we should be trying to convert aliens to Catholicism. The chances they'll respond kindly to proselytizing doesn't seem high...

We have trillions to bail out banks for gambling with our money, but a few million to figure out if we're alone in the universe? That we apparently can't afford...

An old variant of the ancient alien theory says that Phobos isn't a moon, but an abandoned spaceship. It's a surprisingly possible, if unlikely, idea.

A new app that's supposed to teach aliens how to communicate with us seems to underestimate just how different aliens and their technology would be...

Just because an alien invasion is very unlikely doesn't mean we shouldn't spend at least some time and effort preparing for the possibility...

Chandra Wickramasinghe lays out an elaborate theory how the agency tasked with finding proof of alien life is suppressing evidence of alien chemistry and microbes on Earth because reasons.

It makes sense for an alien species not to care about wiping out a civilization on another planet. Question is whether it would be worth the hassle.

Could we spot aliens not by their signals into outer space, but by their mining activity?

Ancient astronaut proponents can't seem to distinguish between the terms plausible and likely.

Even if aliens would try to invade and conquer us, they're probably not going to be in a hurry to do so or even want to spend the effort...

Before closing its doors forever, the Journal of Cosmology lobs one last volley for its theory of panspermia and it's a... well, it's certainly something.