Earth’s deep past leaves plenty of unanswered questions. None currently proves an alien visit, but scientists know the ...

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

When Comet 3I/ATLAS entered our solar system last year—only the third known interstellar object to do so—astronomers took notice. And so did scientists involved in the search for extraterrestrial ...

New SETI protocols outline how scientists should verify, share, and respond to potential evidence of alien intelligence in the modern information age. Reading time 4 minutes The moment of first ...

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, ...

Artificial intelligence may have a far stranger origin than Silicon Valley's technological revolution suggests, according to ...

With the release of "Disclosure Day," Steven Spielberg's new film about aliens, a question as old as science fiction itself resurfaces: If aliens were to arrive on Earth, would they come to conquer us ...