The question of whether aliens exist is not a new one. In science fiction films and books, people have wondered if we’re the only life in this universe and what that can imply for universes beyond ...

While imperceptible to humans, these tiny delays are significant for experiments that rely on pulsars as ultra-precise cosmic ...

Since its debut, "Star Trek" has introduced decades worth of new characters, locations, and alien races, but only a few ...

What if life on Earth didn’t begin here at all, but arrived from somewhere else in the universe? Panspermia is the ...

Consciousness could be a fundamental part of reality, like gravity or matter, according to this controversial theory.

A crowd-sourced search for alien intelligence called SETI@Home is in its final stages, analyzing 100 radio signals of ...

Harvard astrophysicist Avi Loeb's speculative claim that 3I/ATLAS could be an alien AI probe ignites scientific debate, NASA ...

A new paper posits that advanced alien civilizations may communicate through subtle flashes, like fireflies do on Earth. The thought experiment suggests that we need to avoid human biases in our ...

Real scientific efforts at universal communication have also involved mathematics and numbers. The covers of the Golden ...

The SYFY miniseries Childhood's End, based on Arthur C. Clarke's alien invasion novel, has an ending that you won't be able ...

Scientists found new evidence (or lack thereof) disproving the conspiracy theory that interstellar comet 3I/ATLAS is alien ...

Scientists have shortlisted 100 unusual radio signals from space after a 21-year search using Arecibo Observatory data. While ...