Even though these characters only appeared in a single episode of a "Star Trek" series, they left an unforgettable mark on the franchise.

With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.

But 3I/ATLAS is no ordinary rock – it’s a comet from beyond the solar system which greeted the Earth on December 19. It’s ...

The latest instalment saw Ncuti Gatwa return as the Fifteenth Doctor alongside companion Varada Sethu for adventures in 1950s ...

The research is mounting up that we might not be alone in this big wide world. So what's the likelihood that aliens are out ...

A Harvard University astrophysicist has sparked a furious debate by warning he cannot rule out that extraterrestrials are ...