r/askscience↗
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26.4M subscribers6,358 posts / mo in Sep 2026 (incl. <1% by known bots)1,355 authors / mosince 2008
r/askscience has 26.4M members (+0.8% over the last 12 months). It gets about 6,358 posts a month from 1,355 people. Top topics: Big Bang Theory, Moon and Earth Dynamics and Galaxy Exploration.
When to post on r/askscience
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How r/askscience has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/askscience
Top topics
Share of the subreddit's posts
- Big Bang Theory0.2%
- Moon and Earth Dynamics0.1%
- Galaxy Exploration0.1%
- Solar System Scale & Planets0.1%
- Interstellar Objects & Stars<0.1%
Brands people mention
Most-mentioned brands and sites, last 12 months
- Doi
- NASA
- Nature
- ScienceDirect
- Wiley
Everything else about r/askscience
Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.
Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research