Box office smash The Martian has definitely made an impact. The new thriller not only raked in $55 million in its opening weekend, it also apparently prompted some to start questioning everything they know about space. As BuzzFeed has pointed out, several tweets suggest that some moviegoers think the film, in which Matt Damon plays an astronaut stranded on Mars, is based on a true story.
But a lot of people do tweet jokes and sarcastic remarks, so it is possible, and likely, that these users are just kidding around. For example:
That said, some parts of the movie do offer pretty accurate depictions of the red planet’s landscape, as TIME pointed out here.
Read next: What The Martian Gets Right (and Wrong) About Science
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Write to Olivia B. Waxman at olivia.waxman@time.com