[colorado tanker]

Your posts are very readable, although I suspect you are a scientist. Not being a science type myself, I found "The Elegant Universe" a readable introduction to superstring theory and the possibility of other dimensions. It would be very interesting if these people can devise an experiment to prove or disprove what until now has been a essentially a mathematics driven theory.

[RightWhale]

It would be very interesting if these people can devise an experiment to prove

Apparently this Arkani-Hamed theory can be proven in the lab. The same for the brane theory. A good theory would predict results, and the best new theories predict results the old theories cannot. That makes this theory not just another speculation, but an idea that may lead somewhere and attract other researchers.