Just read a VERY interesting article in the Jan. Scientific American and it talked about Loop Quantum Gravity being a reasonable alternative to String Theory. It basically presented the idea that Space/Time comes in discrete units and not continuously as underlies relativity. Anybody know of any more articles/books/sites on this? I like the idea of string theory for a variety of reasons, but facts is facts. This article gave a few tests of this theory that will come forward in the next few years, esp. when a new satellite will be launched in 2006 to examine black hole radiation. Anybody else know of any other upcoming tests that will indicate whether string theory or loop quantum gravity will win the coveted prize as THE unified field theory?