Over the course of the past 50 years in particular, the R rating has given us several of the greatest science fiction movies ...

From Blade Runner 2049 to Ex Machina, these mature sci-fi films are the best of the 21st century.

It seems like great sci-fi movies seem to be coming out more often than ever. But as that continues to happen, some gems continue to be left in the background and don't get watched as often. There are ...