Some of the best science fiction TV shows ever premiered in the 1990s, and they are still worth watching today.

From phone boxes and flux capacitors to black holes and hot tubs, sci-fi has created plenty of ways to explore the fourth ...

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

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

As artificial intelligence begins to mimic consciousness with uncanny skill, we need design norms and laws that prevent it from being mistaken for sentient beings.