If ancient extraterrestrial explorers ever traipsed through Earth's cosmic neighborhood, it's possible they left behind some interstellar litter in their wake. Think of it like the loose hubcaps on ...

There might be alien life on a nearby moon, scientists say - Saturn’s companion Enceladus has long been a particularly promising place to find aliens – and now researchers say that extraterrestrial li ...

Microscopic bits of alien tech on the moon? As scientists searched for intelligent extraterrestrial life — i.e., aliens — they’ve focused on a short list of standard possibilities. In other words, ...

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 ...