Retired military officers claim that aliens are visiting Earth to discourage us from using nuclear weapons on each other. But how would aliens know if we have nukes?

SETI is thinking about how to detect and talk to alien computers instead of just alien beings. And that's a lot harder than it sounds.

As soothing as it may seem, it's very, very, very unlikely there's a union of various alien species that imposes an interstellar order.

Despite what you may have heard, Voyager 2 remains very much under human, not alien, control.

NatGeo gave ancient astronaut theorists the time of day, but did little to rebuke their pseudoscientific arguments in a rare miss.

While we're trying to get aliens' attention with active SETI, we need to keep in mind that we talk to aliens at our own risk.

Ufologists seem convinced that NASA is trying to distort an image showing a gigantic alien spaceship shaped like an X floating through the solar system.

The more spread out an alien species is across the cosmos, the easier it would be to find and contact them. But how widespread could an alien civilization be?

Unfortunately, District 9 seems like a realistic look at how we'd treat an alien species that can't really defend itself from us.

Ufologists love to talk about the rumored alien battle over Nuremberg, Germany in 1561. But there's no evidence it actually happened or that the cited sources ever existed.

Based on the premise of SETI, if we do start talking to aliens, the ensuing conversation could get awkward very quickly...

As we scream into space to get the attention of extraterrestrial life, we should remember there may be monsters out there.