From SMUPhysics https://twitter.com/SMUPhysics on Twitter: Join us for the 5th annual SMU celebration of Dark Matter Day on Oct. 29! Dark matter rocks will be hidden across the campus ... can you find them? Join the search for dark matter: look for these little symbols of the unknown ... and claim your prize! https://www.physics.smu.edu/web/events/darkmatterday/ https://twitter.com/SMUPhysics/status/1453361088721006599/photo/1 https://chirp.cooleysekula.net/attachment/73026