Ethan Siegel has a review of some of the current contenders for a theory of Quantum Gravity on his blog Starts With A Bang. The review is found at Ask Ethan #91: Does Quantum Gravity Need String Theory?. I'm not going to try to interpret what he says. He gives a quick overview of 5 different ideas which are currently being investigated. Interesting for any body interested in the subject.

Bill Gill


C is not the speed of light in a vacuum.
C is the universal speed limit.