and transported it to outer space: High Noon (1952) became Outland (1980), The Magnificent Seven (1960) was spoofed in Battle Beyond the Stars (1980), Enemy Mine (1985) was essentially a remake of Hell in the Pacific (1968) with Lee Marvin and Toshiro Mifune, and the chariot race of Ben-Hur (1959) was duplicated in the pod-race of Star Wars: Episode I - The Phantom Menace (1999).

Further, there are many examples of blurred or hybrid science fiction films that shared characteristics with lots of other genres including:

Many early films in this genre featured similar fanciful special effects and thrilled early audiences. The pioneering science fiction film, a 14-minute ground-breaking masterpiece with 30 separate tableaus (scenes), Le Voyage Dans La Lune (A Trip to the Moon) (1902), was made by imaginative,turn-of-the-century French filmmaker/magician Georges Melies, approximating the contents of the novels by Jules Verne (From the Earth to the Moon) and H.G. Wells (First Men in the Moon). With innovative, illusionary cinematic techniques (trick photography with superimposed images, dissolves and cuts), he depicted many memorable, whimsical old-fashioned images:

a modern-looking, projectile-style rocket ship blasting off into space from a rocket-launching cannon (gunpowder powered?)
a crash landing into the eye of the winking 'man in the moon'
the appearance of fantastic moon inhabitants (Selenites, acrobats from the Folies Bergere) on the lunar surface
a scene in the court of the moon king
a last minute escape back to Earth
Otto Rippert's melodramatic and expressionistic Homunculus (1916, Ger.) - mostly a lost silent film - was a serial (or mini-series) composed of six one-hour episodic parts.