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They must've taken out an insurance policy on me... sighhh... ...sighhh... Millions of years ago, the 'ultrasaurs' wander the earth. Some weigh over 70 tons. Even the vicious allosaurs are no match for these giants. A distant rumbling sends the ultrasaurs into a stampede. It's a Calvinosaurus. Named after the renowned paleontologist who discovered it, the Calvinosaur can eat an ultrasaur in a single bite. Calvin, digging a hole, says he never finds anything. Hobbes thinks it looks like he hit the sewer pipe.