Space and Time
Links
Stanford Encyclopedia of Philosophy: The Hole Argument
http://plato.stanford.edu/entries/spacetime-holearg/
The hole argument is an attempt to illustrate how spacetime substantivalism causes errors in a large class of spacetime theories; by John D. Norton.
Stanford Encyclopedia of Philosophy: Time Travel and Modern Physics
http://plato.stanford.edu/entries/time-travel-phys/
The paradoxes inherent in the idea of time travel are explained in the context of modern physics; by Tim Maudlin.