Allosaurus is a species of theropod dinosaur from the Jurassic. It appeared in four Sunday strips and a story arc.

6/27 through 7/7 1990 story arc

Allosaurus story arc.png

Allosaurus appeared in this 1990 story arc. In it, Calvin and Hobbes had traveled back in time 140 million years on a photo safari. They came across Diplodocus, Stegosarus, and an Allosaurs – all of which had actually died out by 140 Ma BC. The Allosaurus was hostile to the time travelers, who only narrowly escaped.

Calvin the Allosaur

Calvin, the Awful Allosaur

Ultrasauros attack

Brontosaurus attack

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