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r/scifi
4.4M members
r/scifi is a subreddit with 4.4M members. Its distinguishing qualities are that the community is massive in size, and has crazy activity.
Science Fiction, or Speculative Fiction if you prefer. Fantasy too. Asimov, Bradbury, Clarke, Dick, Heinlein and other SF books. SF movies and TV shows. Fantasy stuff like Tolkien and Game of Thrones. Laser guns, space ships, and time travel. etc. Star Trek, Battlestar, Star Wars, etc.
Popular Themes in r/scifi
#1
Advice Requests
: "What are some good Sci-Fi media that aren't horror or action?"
10 posts
#2
Solution Requests
: "Japan pioneers type-free artificial red blood cells, offering a universal blood substitute that solves blood type incompatibility and transforms transfusion medicine"
1 post
Popular Topics in r/scifi
#1
Sci Fi
: "Which Sci Fi weapons/tools would you want to have?"
91 posts
#2
Movie
: "Steven Spielberg’s Untitled Sci-Fi UFO Movie Has Wrapped Filming, Confirms David Koepp"
42 posts
#3
Space
: "Spaceballs the LEGO! I designed yet another 75375 Millennium Falcon alternate build! Surprising sturdy and no extra pieces required."
30 posts
#4
Movies
: "Official Poster for 'Project Hail Mary' Starring Ryan Gosling"
17 posts
#5
Books
: "‘Riverworld’ Books by Philip José Farmer were adapted TWICE for TV by Syfy (2003 & 2010), both adaptations were terrible"
16 posts
#6
Scifi
: "Scifi shower thought: Plastic would be a lot harder to produce in space than steel."
13 posts
#7
Tv
: "Legion (Tv series) is slept on."
10 posts
#8
Trailer
: "SITE Official Trailer (2025)"
9 posts
#9
Book
: "Any of these worth reading? Got a bunch of old sci-fi Books donated"
8 posts
#10
Star Trek
: "Simon Pegg Wants ‘Star Trek 4’ To Get Back To The Spirit Of The Original Series: “Things don’t have to be gritty and dark to be for adults.”"
7 posts
Member Growth in r/scifi
Yearly
+157k members(3.7%)
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