I think we need a science geekery section. Maybe with sections for tech, nature/bio science, etc (I can't think of other science-y things at the moment...maybe just one big science nerd section would work). The closest section currently is the "book knowledge" section but there's alot of knowledge that isn't always in book form.
I was just thinking about how much David Attenborough totally rocks (I'm watching one of his films at the moment) and was thinking about things I'd like to start discussions on, but they don't really fit in the film section and don't fit in the book section...yes they are films but the discussion/questions are more about the science aspects.

There is a section made here for all learned knowledge, including science. You can find it in the Book Worms section