Could ancient humans really have built the pyramids without extraterrestrial help? Or do such questions reveal more about modern anxieties than the past itself?

Debunking alien claims matters, but so does telling richer, more compelling stories about how humans shaped their own past.

The new film probes the possibility of alien life – here's how the science of Project Hail Mary stacks up.

Syfy's highly-rated sci-fi drama was cancelled after four seasons but it's still popular on streaming services. Get all the details.