What are all the known ones? And do you think there will ever be a conclusive amount of them? I'm writing an essay on questions which science can/never/can't yet answer, and the dimension one is in...
Can anyone recommend a good set of headphones for an ipod nano, my daughter has already managed to blow 2 sets the 1st from a shuffle 6 months old, the second set bought with a new nano from the apple...