If ancient alien explorers ever traipsed through Earth's cosmic neighborhood, could it be possible they left behind some interstellar litter on the moon?

There might be alien life on a nearby moon, scientists say - Saturn’s companion Enceladus has long been a particularly ...

Saturn's moon Enceladus could harbour alien life in oceans deep beneath its frozen surface, according to a new study.

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 ...