Infinity has always been a problem for me, apart from the concept I do not believe it exists. numbers go on to infinity and even negative infinity but they don't really exist so they don't count (hehe). some people say the universe is infinite in size. well apart from infinite in the same way as a spheres curved surface is infinite then no the universe cannot be infinite. I raised this with a colleague, he said from a maths point of view (and presumably physics) that infinite just means immeasurably large but finite. Is that true? If so please call it something else other than infinite may I suggest [tex]\infty[/tex]-1 (lol) If its not true how can infinite be used within equations to describe 'real' things because its impossible.