Science fiction has always been one of the most versatile and interesting genres in movies.

After all, sci-fi, by design, is meant to be challenging.

In the future, space-traveler Tommy transports an aging Tree of Life through deep space towards a dying star.

The ensemble cast on Inception standing on a street.

Image via Warner Bros.

DirectorDarren Aronofskyis no stranger toweaving challenging narratives and complex themes, andThe Fountainmight behis most audacious work to date.

A miscalculation causes Cole to be sent back too far, and he winds up in a psychiatric hospital.

For the uninitiated, really any film from visionary directorTerry Gilliamcan be overwhelming.

The tree of life in The Fountain

Image via Warner Bros. Pictures

In terms of science fiction, one would be hard-pressed to finda movie more dense and technical thanPrimer.

It takes a truly dedicated mind to fully comprehend the intricacies ofPrimer’s head-scratching time travel narrative.

Coherenceis abrilliant slice of contained, sci-fi thrillsexecuted with an unsettling degree of authenticity.

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The paranoia is palpable, and the implications of certain events make for a stirring mystery.

That said,Coherenceis rarely easy to follow.

Visionary directorChristopher Nolanand out-there concepts go hand in hand, andInceptionmight behis most ambitious work to date.

Donnie, Gretchen, and Frank the Rabbit in a movie theater in Donnie Darko.

Image via Newmarket Films

Once the layers of the narrative begin overlapping, it’s sure to make heads spin.

Lena (Natalie Portman) is tasked with leading a research team into the zone and studying its effects.

What they find will challenge their understanding of humankind’s relationship with nature.

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Annihilationissci-fi horror at its most thought-provoking.

A crew of astronauts aboard Discovery One embarks on a mission to Jupiter in search of answers.

2001: A Space Odysseyis cinema’s finest example of unadulterated science fiction.

Two patients played by Brad Pitt and Bruce Willis in a mental institution talk to each other in 12 Monkeys.

Image via Universal Studios

NEXT:10 Drama Movies That Are Perfectly Directed, Ranked

12 Monkeys Movie Poster

Two men looking at a machine in Primer

Image via THINKFilm

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Dr. Banks (Amy Adams) stands amongst mist as two large aliens with multiple spider-like limbs release a ring of black smoke around her

Image via Paramount Pictures

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The main cast of ‘Coherence’

Image via Oscilloscope Laboratories

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Young and Old Joe talkign in a diner in Looper

Image via TriStar Pictures

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Arthur running through a revolving hallway in Inception

Image via Warner Bros. Pictures

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Scientists including Natalie Portman walking into the Shimmer from ‘Annihilation’

Image via Paramount Pictures

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An astronaut under a red light looking ahead in 2001- A Space Odyssey

Image via Warner Bros.

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2001: A Space Odyssey

Inception