A few notes about the site mechanics
A few notes about the community
If English is not your first language, don't let that make you afraid to post or comment. You can get English help on Discussion- or Main-level posts by sending a PM to one of the following users (use the "send message" link on the upper right of their user page). Either put the text of the post in the PM, or just say that you'd like English help and you'll get a response with an email address.
* Normal_Anomaly
* Randaly
* shokwave
* Barry Cotter
A note for theists: you will find the Less Wrong community to be predominantly atheist, though not completely so, and most of us are genuinely respectful of religious people who keep the usual community norms. It's worth saying that we might think religion is off-topic in some places where you think it's on-topic, so be thoughtful about where and how you start explicitly talking about it; some of us are happy to talk about religion, some of us aren't interested. Bear in mind that many of us really, truly have given full consideration to theistic claims and found them to be false, so starting with the most common arguments is pretty likely just to annoy people. Anyhow, it's absolutely OK to mention that you're religious in your welcome post and to invite a discussion there.
A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
- The Worst Argument in the World
- That Alien Message
- How to Convince Me that 2 + 2 = 3
- Lawful Uncertainty
- Your Intuitions are Not Magic
- The Planning Fallacy
- The Apologist and the Revolutionary
- Scope Insensitivity
- The Allais Paradox (with two followups)
- We Change Our Minds Less Often Than We Think
- The Least Convenient Possible World
- The Third Alternative
- The Domain of Your Utility Function
- Newcomb's Problem and Regret of Rationality
- The True Prisoner's Dilemma
- The Tragedy of Group Selectionism
- Policy Debates Should Not Appear One-Sided
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site!
Once a post gets over 500 comments, the site stops showing them all by default. If this post has 500 comments and you have 20 karma, please do start the next welcome post; a new post is a good perennial way to encourage newcomers and lurkers to introduce themselves. (Step-by-step, foolproof instructions here; takes <180seconds.)
If there's anything I should add or update on this post (especially broken links), please send me a private message—I may not notice a comment on the post.
Finally, a big thank you to everyone that helped write this post via its predecessors!
You make me suddenly, intensely curious to find out what a Reynolds number is and why it can make streamlining increase drag. I am also abruptly realising that I know less than I thought about STEM fields, given I just kind of assumed that astrophysicists were the official People Who Know About Space and therefore rocketry must be part of their domain. I don't know whether I want to ask if you can recommend any good fluid dynamics introductions, or whether I don't want to add to the several feet high pile of books next to my bed...
Okay - so why do you think quantum mechanics became more "cool" than fluid dynamics? Was there a time when fluid dynamics held the equivalent prestige and mystery that quantum mechanics has today? It clearly seems to be more useful, and something that you could easily become curious about just from everyday events like carrying a cup of tea upstairs and pondering how near-impossible it is not to spill a few drops if you've overfilled it.
The best non-mathematical introduction I have seen is Shape and Flow: The Fluid Dynamics of Drag. This book is fairly short; it has 186 pages, but each page is small and there are many pictures. It explains some basic concepts of fluid dynamics like the Reynolds number, what controls drag at low and high Reynolds numbers, why golf balls (or roughened spheres in general) have less drag than smooth spheres at high Reynolds number (this does not imply that roughening always reduces drag; it does not on streamlined bodies as is explained in the book), how drag... (read more)