The pair of fighting dinosaurs tumbled across the sidewalk in front of me, bringing me to an abrupt halt. Screeching, flipping tail over talon, grasping at each other with their sharp, three-toed hind feet and stabbing at each other with their mouths, they didn’t even pause when they rolled over a vertical drop twice their own body length.

  Full story and photo at the McWane Science Center Blogspot.