Greetings. I’ve been a sideline follower of string theory ever since I seen Dr. Michio Kaku quite awhile back on Tech TV’s “Big Thinkers.” Recently I watched the three hour NOVA special “The Elegant Universe” hosted by Brian Greene. I have some issues with some of the ideas presented and I’m sure someone here can point me in the right direction. The way Einstein’s vision of gravity was presented with the warps in the fabric of space-time made no sense. The graphic depicted space-time as two dimensional, which would require an additional and unseen downward force on the orbiting body. Is there a three dimensional representation of Einstein’s space-time available on the internet? Have the ideas that 1) gravity is a side effect of the strong nuclear force (more mass = more proton/neutron bonds = gravity “bleeding off”) and that 2) week nuclear is the same as EM, already been studied and dismissed? Couldn’t time be something we made up? Why does it get its own dimension? How do comets that travel vast distances—pass by many “orbital” planets—still orbit the sun. Thank you in advance for your time, JDMatson.