From SMUPhysics https://twitter.com/SMUPhysics on Twitter: The @SMU # "Dark Matter Rock Hunt" is on until 4:30pm! As you go about your normal daily wanderings on campus, be extra observant... look for Dark Matter Rocks hidden in the world around you. Take a selfie, tag with #, and bring to FOSC 102 for a prize! https://twitter.com/SMUPhysics/status/1057633035976404992/photo/1 https://chirp.cooleysekula.net/attachment/52416