You go back into the time of T-rexes and pterodactyls. You find that in addition to feathers, most of the dinosaurs have giant ears. Ears are made of cartilage and decompose rather than fossilize, which would explain why this hasn't been found out yet. You notice that the hot cocoa you brought in the time machine with you is beginning to form ripples. There's a T-rex approaching. What will you do?