A helmeted robot lands a flying saucer in a park in Washington, D.C. Dinosaurs freely roam a small isle off of Costa Rica. The Mayan calendar accurately predicts the fiery end of the world. Are the plots of sci-fi movies really that far-fetched?
Of course they are. But NASA, whose space engineers are apparently also sci-fi movie buffs, has compiled a list of the most — and least — realistic science fiction films of all time.