r/UnresolvedMysteries
Unresolved Mysteries
Founded April 2013 · Public — anyone can post
A subreddit dedicated to the unresolved mysteries of the world. Submissions should outline a mystery and provide a link to a more detailed review of the case such as a Wiki article or news report. Replies analysing and speculating over the mystery and possible explanations are encouraged. -
Members
4,498,723
4.5M
Online now
—
not captured in the last snapshot
Posts per day
2.2
from the last 100 posts, spanning 45.2 days
Comments per post
—
no sample yet
Growth · 7d
—
not enough history yet
Growth · 30d
—
not enough history yet
Published rules
15
2 mention promotion — quoted below
Last post
Nov 6
sampled Nov 6
Distinct posters
59%
of the last 100 posts
Tracking since Sep 23 · growth spans are the real distance between snapshots, not rounded windows. Posts/day is measured from the community’s own newest posts on Reddit, not from what Prowlo happens to crawl.
Member growth
Tracking since Sep 23 — growth charts appear after a week of history.
What works in r/UnresolvedMysteries
Every post in a recent sample, labelled by format. Share is how much of the sample used that format; average score is how it performed.
| Format | Share of posts | Avg score |
|---|---|---|
| News / link | 55% | 1,523 |
| Lessons / story | 39% | 983 |
| Discussion | 3% | 8 |
| Show & tell | 2% | 1,929 |
| Question | 2% | 637 |
Based on 66 posts sampled in September 2026. A sample, not the full history.
- Median score
- 806
- Top 10% score
- 2,450
- Text posts
- 97%
- Got no replies
- 0%
- Busiest windows
- Mon 11:00 UTC, Mon 23:00 UTC
Posting rules, in plain words
Self-promotion is banned. Promotion goes in Meta Monday! (weekly).
- Stay on topic: Advertising is only allowed with explicit permission from the Moderators.
- No advertising.: Advertising any service, site, media -- anything that can be advertised -- requires prior permission from the mods. No personal YouTube or other video channels.
- Posting Guidelines: A sufficient summary so people can become familiar with the case & participate in discussion without having to leave reddit for info. One or more links to credible 3rd party sources. See above link for specifics. One or more Discussion points / Questions for users. A minimum post length of 750 characters
- Overposting: Please limit your number of posts to 3 per week. This rule is in effect so one poster does not take over the whole sub.
Quoted from the community’s own published rules. Always re-read them before posting.
What a good comment looks like here
- — Expresses strong emotional reactions (e.g., shock, sadness, anger, hope) to the case details.
- — Provides additional relevant information or context about the case or similar cases.
- — Asks thoughtful, probing questions that further the discussion.
- — Offers personal anecdotes or experiences that relate to the case's themes (e.g., family dynamics, mental illness, or the difficulty of disappearing).
- — Suggests investigative leads or methods, especially when backed by personal research or knowledge.
- — Corrects factual inaccuracies or provides clarifications.
What r/UnresolvedMysteries's rules say about promotion
2 of 15 published rules mention promotion, advertising or spam. Quoted from the community's own rules page, not summarised.
Stay on topic
rule 1 of 15
s the name suggests, this community is dedicated to discussion of the world's unresolved mysteries. Topics covered in this subreddit include: * Unresolved Disappearances * Unresolved Murders * Strange Deaths * Historical Mysteries * Lost Artifacts * Unexplained Phenomena * Cryptids and any other Mysteries you might want to discuss provided they follow our posting guidelines. Please don't post about unrelated topics. Advertising is only allowed with explicit permission from the Moderators.
Removal reason shown to posters: Off-topic / Advertising
No advertising.
rule 11 of 15
Linking to other subs in comments is okay, making a post to advertise a sub requires prior permission from the mods. If you're writing up a case and there are relevant threads in another sub, link away. Advertising any service, site, media -- anything that can be advertised -- requires prior permission from the mods. No personal YouTube or other video channels.
Removal reason shown to posters: Advertising
The other 13
- Posting Guidelines
- Commenting Guidelines
- Name: No murder/disappearances from the past 6 months
- Undocumented / personal / anecdotal "mysteries" are not allowed
- User involvement in cases
- Personal Information & Witchhunting
- Updates, Meta-Threads and Reposts
- Site-wide Rules and Reddiquette
- Moderator's Discretion and how you can help us
- Don't accuse persons cleared by LE or not officially named as suspects.
- Claims being made in comments should include sources where possible.
- No Cut and Paste/AI/Chat GPT
- Overposting
Read from r/UnresolvedMysteries’s published rules on Sep 23. Communities change their rules without notice and enforce requirements (karma, account age, flair) that may live in the sidebar or automod rather than here — the source page is the authority.
Similar by content
Communities that discuss what r/UnresolvedMysteries discusses.
Mystery applies to what cannot be fully understood by reason or, less strictly, to whatever resists or defies explanation.
Explorations of the Paranormal, UFOs, Ancient Cultures, Cryptozoology, Consciousness, Futurism, Fringe Science, Anomalies, Animal Mutilations, and instances of High Strangeness.
Reddit's forum for discussion of all aspects of actual crimes, the victims and their legal processes. Unlike some subs, our community allows videos or links to kick off discussion. Be kind to others and enjoy the true crime conversations.
A community for discussion related to Unidentified Flying Objects. Share your sightings, experiences, news, and investigations. We aim to elevate good research while maintaining healthy skepticism.
This is a forum for free thinking and for discussing issues which have captured your imagination. Please respect other views and opinions, and keep an open mind. Our goal is to create a fairer and more transparent world for a better future.
See the full lists on similar subreddits.
r/UnresolvedMysteries — frequently asked
How many members does r/UnresolvedMysteries have?
r/UnresolvedMysteries has 4,498,723 members as of our most recent crawl on Sep 23. Prowlo re-checks tracked communities on a rolling schedule, so this figure moves rather than sitting frozen at whatever it was when a scraper last ran.
Is r/UnresolvedMysteries growing?
We don't have 30 days of snapshot history for r/UnresolvedMysteries yet, so we're not going to invent a growth number. We've been tracking it since Sep 23; the chart fills in as history accumulates.
How active is r/UnresolvedMysteries?
Around 2.2 posts per day, measured from the newest 100 posts on Reddit, which span 45.2 days. Posting rate matters more than subscriber count when you're deciding where to spend your time — it determines how long your comment stays visible.
When was r/UnresolvedMysteries created?
r/UnresolvedMysteries was founded in April 2013 and is a public — anyone can post community. Age matters: an older community with steady growth has survived Reddit's moderation churn; a young one with a spike may not.
Who posts in r/UnresolvedMysteries?
Of the last 100 posts we sampled, 59% came from distinct accounts; the newest was published Nov 6. A low share means a feed dominated by a handful of accounts (bots, mods, or one prolific poster) rather than a community.
Can I promote my product in r/UnresolvedMysteries?
r/UnresolvedMysteries publishes 15 rules and 2 of them address promotion. The first, “Stay on topic”, says: s the name suggests, this community is dedicated to discussion of the world's unresolved mysteries. Topics covered in this subreddit include: * Unresolved Disappearances * Unresolved Murders * Strange Deaths *… Read the full rule text on this page and the community's rules page before posting — moderator enforcement is the thing that actually decides.
How do I monitor r/UnresolvedMysteries for mentions?
Hit Watch on this page. Prowlo starts crawling r/UnresolvedMysteries into your Dataset — every new post indexed and embedded, searchable semantically, queryable by your AI agent over MCP, and able to trigger keyword alerts in Slack. Prowlo is read-only; it never posts on your behalf.
Can my AI agent read r/UnresolvedMysteries's stats?
Yes. Everything on this page is one MCP tool call away: catalog_get_subreddit returns r/UnresolvedMysteries's members, growth, promo tolerance and similar communities as typed JSON — free, no credits. Connect your agent to api.prowlo.com/mcp and it can vet the community and start watching it in the same conversation.
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