Calvin and Hobbes by Bill Watterson for March 04, 1990
140 Million years ago the incredible 'ultrasaurs' wander the earth! Some weigh over 70 tons, and even the vicious allosaurs are no match for these giants! But wait! A distant rumbling sends the ultrasaurs into a panicked stampede! is it a volcano? Is it an earthquake? No! It's...It's a Calvinosaurus! Named after the renowned archeologist who discovered it, the huge Calvinosaur can eat an ultrasaur in a single bite! Calvin: Phooey! I never find anything. Hobbes: It looks like you've hit the sewer pipe.