nice essay from the university of sussex about time. begins: “the intriguing notion that time might run backwards when the universe collapses has run into difficulties. raymond laflamme, of the los alamos national laboratory in new mexico, has carried out a new calculation which suggests that the universe cannot start out uniform, go through a cycle of expansion and collapse, and end up in a uniform state. it could start out disordered, expand, and then collapse back into disorder. but, since the COBE data show that our universe was born in a smooth and uniform state, this symmetric possibility cannot be applied to the real universe.” includes sections like, does time exist?, how to build a time machine, and engeneering wormholes. authors homepage also offers an essay on quantum mysteries among other things.