"To create this ranking of the 25 best sci-fi movies of the last 25 years, the staff of ScreenCrush first assembled an enormous (and thus very poorly named) shortlist of contenders that included almost every science-fiction film released since 1991. (Seriously, everything was on it. Freaking ‘Sphere’ was on it.) Each writer picked their 25 favorites from that shortlist; from there, a second round of voting determined the final order of the list you’re about to read."
When their relationship turns sour, a couple undergoes a procedure to have each other erased from their memories. But it is only through the process of loss that they discover what they had to begin with.
In 2074, when the mob wants to get rid of someone, the target is sent into the past, where a hired gun awaits - someone like Joe - who one day learns the mob wants to 'close the loop' by sending back Joe's future self for assassination.
Astronaut Sam Bell has a quintessentially personal encounter toward the end of his three-year stint on the Moon, where he, working alongside his computer, GERTY, sends back to Earth parcels of a resource that has helped diminish our planet's power problems.