From SMUPhysics http://status.hackerposse.com/url/17305 on Twitter: Wednesday, Oct. 31 is #DarkMatterDay! (also Halloween... total coincidence) Celebrate with us by participating in the Dark Matter Rock Hunt organized by the Society of Physics Students. 13 "Dark Matter Rocks" will be hidden across campus. Find one, return it, and win a prize bag! http://status.hackerposse…