Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

Project Hail Mary, Solaris, and The Hitchhiker's Guide to the Galaxy are all among the very best sci-fi books set in space.

The video ranks the wildest alien megastructure ideas, from famous Dyson spheres to black-hole planets, ring worlds, ...

A mysterious object from another star system is racing through our Solar System, and every major space telescope is watching. The more astronomers learn about 3I/ATLAS, the stranger it becomes.

The Voyage Home is heading back to UK cinemas this September, with new commemorative artwork to match. Check it out below!

You might think that legendary sci-fi author Arthur C. Clarke would've adored the Star Trek franchise, but that wasn't ...

More than 500,000 stars glow in shades of red, white, and blue in a spectacular new image captured by NASA's Hubble Space ...

A traditionalist Catholic nun has claimed that UFO sightings are really encounters with 'fallen angels', aligning with ...

Lawmakers and Trump UFO advisors are naming the private corporations who allegedly operate crash retrieval programs and are ...

From ex-presidents in power armor to thinly veiled stand-ins for real-world suits, I rank 12 of the most unhinged public ...