Want to fry your brain?
If the summer holidays are making you feel like your brain is atrophying (possibly this only applies to people who are technically on a summer break) then have a look at my latest Stumble - a video about imagining the ten dimensions. I think it's a beginner's guide to String Theory but it does have a comment at the end that this is not conventional thinking on String Theory. It is very interesting and now my brain is steaming gently. Oh, why do I have physics listed as a favourite on Stumbleupon??....
(Answer: because it's fascinating!)
(Answer: because it's fascinating!)