Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

The question of whether humanity is alone in the universe has fascinated scientists for generations, but few have pursued an answer as publicly or as controversially as Harvard astrophysicist Avi Loeb ...

With over decades of films and convincing radio plays, aliens have captivated our imaginations and our worst fears. They’ve come in all shapes and sizes, looking either cute and cuddly or absolutely ...

Some scientists believe the sheer number of stars, planets and potentially habitable environments in space makes ...

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 ...

You might think this column is about UFOs and the Pentagon's recent declassified files. It's not. We're talking about technosignatures, the evidence of alien technology: a radio or laser signal, ...