How could we defend Earth against an alien Invasion? Do we even stand a chance? Could the United States, Russia and China ...

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

We've all grown up dreaming of aliens landing on the Earth or laser beaming across the sky; well, either way, it's sci-fi and ...

This story first appeared in Trying!, a thoughtful, funny, wide-ranging daily newsletter featuring essays from the mind of Matt Gross. You can sign up for them here. Those were simple aliens for ...

From the creators of XCOM's Long War mod, Terra Invicta bridges the gap between civilization on Earth and the vast interstellar empires of other space strategy games.

Later in December, the 3I/ATLAS interstellar comet will get as close to Earth as it ever will. Here's what to know.