Ahhh..now I see where Robbo is coming from..MSN Science page!
So...it would seem, that Robbo's Paper clip conundrum, could be explained, if..as theorised by String Theorists, our dimensions are a part of "Branes"..which is short for membranes...what they propose, is that our perception of gravity as weak, is caused by teh fact that...it is actually, just a gravity "leak"...teh strong gravity, that we all know to have a far reaching affect across the galaxy and probably beyond, exists in parallel to teh weaker gravity that is demonstrated with the paperclip/magnet scenario...what happens, is that when two particles collide, in teh strong gravity....a graviton is released, which crosses the "brane"...so...to me, its like when you flip that little cover on your hoover, that reduces teh suction so you can clean your mums net curtains without pulling them down...and as such...this smaller amount of gravitons, is what we percieve as teh "weak" gravity....it all makes sense now!
EDIT: Robbo and others may be interested, in a book called "The Elegant Universe", by Brian Greene...
http://www.msnbc.msn.com/id/13070896/