r/tldr

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r/Favors
31k  subs
We're all about favors from redditors to redditors. We're totally against ditch-digging and liking stuff on Facebook. The rest of it is in the FAQ.
https://reddit.com/r/Favors/
r/cogsci
91k  subs
The interdisciplinary study of mind and intelligence, embracing philosophy, psychology, artificial intelligence, neuroscience, linguistics, and anthropology.
https://reddit.com/r/cogsci/
r/humor
2m  subs
Humor is the place for things that bring a wry smile to your face.
https://reddit.com/r/humor/
r/offbeat
472k  subs
Offbeat: funny, weird, sad, strange or quirky news that's just....just offbeat :)
https://reddit.com/r/offbeat/
r/wikipedia
290k  subs
The most interesting pages on Wikipedia.
https://reddit.com/r/wikipedia/
r/TrueReddit
441k  subs
A subreddit for really great, insightful articles and discussion. Please follow reddiquette, and READ THE ARTICLE before voting or discussing. Downvotes should only be used if something doesn’t contribute to intelligent discussion, not just because you disagree. Please use the report button if you see something that doesn’t belong.
https://reddit.com/r/TrueReddit/
Welcome to the University of Reddit, a place for redditors to teach redditors.
https://reddit.com/r/UniversityofReddit/
r/DepthHub
323k  subs
DepthHub gathers the best in-depth submissions and discussion on Reddit. You can use [the DepthHub](http://www.reddit.com/user/Lapper/m/depthhub) as an alternative front page with high quality discussion and inquiry. For more on the theory of DepthHub, [read this post from our founder](http://redd.it/bkd0n).
https://reddit.com/r/DepthHub/
r/WebGames
101k  subs
Want to kill time? Come and play a web game! No sign-ups, no fuss, no muss, no spam.
https://reddit.com/r/WebGames/
r/shittyadvice
81k  subs
A community for giving and getting the worst advice possible.
https://reddit.com/r/shittyadvice/
r/secretsanta
128k  subs
/r/secretsanta and Reddit Gifts were started in 2009 to provide a secret santa for the Reddit community. We have since expanded to many gift exchanges.
https://reddit.com/r/secretsanta/
r/reddit.com
816k  subs
The original subreddit, now archived.
https://reddit.com/r/reddit.com/
r/Foodforthought
279k  subs
Intelligent and thought-provoking commentaries on life and culture with an emphasis on longform articles and essays that stimulate intellectual discourse.
https://reddit.com/r/Foodforthought/
r/scifi
1m  subs
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.
https://reddit.com/r/scifi/
r/answers
180k  subs
Reference questions answered here.
https://reddit.com/r/answers/
r/self
673k  subs
a place to put self-posts for discussion, questions or anything else you like.
https://reddit.com/r/self/
This subreddit is for **reddit-wide ideas for improvement**.
https://reddit.com/r/ideasfortheadmins/
r/xkcd
123k  subs
/r/xkcd is the subreddit for the popular webcomic xkcd by Randall Munroe. Come to discuss the comics and other work by Randall with other fans.
https://reddit.com/r/xkcd/
r/bestof
5m  subs
The very best comments on reddit.
https://reddit.com/r/bestof/
r/windowshots
19k  subs
Windowshots is a place for redditors to give each other a brief glimpse into each other's lives. Where do you reddit from? If you looked up from your desk, what would you see? Well, grab your camera and show us!
https://reddit.com/r/windowshots/
r/netsec
323k  subs
A community for technical news and discussion of information security and closely related topics.
https://reddit.com/r/netsec/
r/circlejerk
367k  subs
Message the mods if you'd like to be banned.
https://reddit.com/r/circlejerk/