With Halloween fast approaching, it's time to decide on a costume. While you can always shop at the local mega mart or costume shop, the selection for women tends to be limited to sexy pirate, sexy devil, sexy witch and similar "sexy" costumes. So what do you do if you want to dress up as something a bit more clever? Twisted Physics has some suggestions for physics-related costumes that should be great conversation starters. Going as Maxwell's Demon or Schroedinger's cat would make you the talk of the party.