r/AskScienceFiction
r/AskScienceFiction is a Science & Education community on Reddit with 887,840 members, ranking #47 of 2,165 in Science & Education. **It's like Ask Science, but all questions and answers are written with answers gleaned from the universe itself.** Use in-universe knowledge, rules, and common sense to answer the questions. Or as **fanlore.org** calls it [Watsonian, not a Doylist point of view](http://fanlore.org/wiki/Watsonian_vs._Doylist)
How big is r/AskScienceFiction?
Created in 2011, r/AskScienceFiction has had over a decade to grow and is a large community by Reddit standards. Within Science & Education it ranks #47 of 2,165 communities we track — the top 2.2% of the category by subscriber count. That puts it about 440× the median Science & Education subreddit, which has 2,019 members. It is a work-safe community with no 18+ flag on Reddit.
For scale, the largest Science & Education community we track is r/science with 34,470,477 members — roughly 39 times the size of r/AskScienceFiction. Reddit itself launched in 2005, so a subreddit created in 2011 sits in the middle wave of community building on the platform. Subscriber counts indicate reach, not activity — a large community can be quiet, and a smaller one busy. Open r/AskScienceFiction on Reddit to see how often people actually post before deciding whether it is worth joining.
| Members | 887,840 |
|---|---|
| Category | Science & Education |
| Rank in category | #47 of 2,165 |
| Created | 2011 |
| Category median size | 2,019 members |
| Content rating | Work-safe (SFW) |
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Subscriber counts come from the public Reddit API and are refreshed when this directory is rebuilt. Redditory is not affiliated with Reddit Inc.