The Open Thread posted at the beginning of the month has gotten really, really big, so I've gone ahead and made another one. Post your new discussions here!
This thread is for the discussion of Less Wrong topics that have not appeared in recent posts. If a discussion gets unwieldy, celebrate by turning it into a top-level post.
Yes, this is what I was curious about, thanks. I've seen others cite humanity's existential risks as their motivations too (mostly uFAI, not as much nuclear war or super-flu or meteors). I'm like you in that for me it's definitely a mix of learning and entertainment.