Calvin asks Mom if he can use a garden shovel. She asks why. He and Hobbes are going on an archeological expedition. Mom suggests that if he's looking for fossilized remains, he could dig through his room. Calvin doesn't think that's too funny. He says he'll name an Australopithicus woman after her.

Calvin, wearing a pith helmet and carrying a shovel, is telling Hobbes about paleontology. He says scientists can tell how old something is by analyzing the layers of dirt it's in. Hobbes touches Calvin's head. He looks at his finger and says Calvin must be six years old. Calvin says Hobbes is a scream.

Calvin says archeologists dig slowly and carefully, using small, delicate tools. Each rock has to be painstakingly brushed and scraped so nothing is broken or missed. He digs and scrapes for a while. Calvin looks up and says they have the most mind-numbing job on the planet. Hobbes holds up the brush they've been using. He says he doesn't think Dad will want to shave with that in the morning.

Calvin hits something. Hobbes tells him to carefully dig it up. Calvin pulls out something covered in dirt. He wonders what it is. Hobbes tells him to dust it off. Calvin does, and he holds a Coke bottle. Calvin surmises it's some bizarre skull. Hobbes says to look at its mouth. Maybe it's a prehistoric anteater.

Calvin can't believe they found a dinosaur skull on their first archeological dig. Hobbes wonders if the rest of the skeleton is nearby. Calvin says that if they find it, they'll be world famous. Calvin thinks the grant money can buy a Porsche. Hobbes thinks his smiling face would look good on the cover of National Geographic.

Calvin is excited to find another bone. He wonders what it is. Hobbes holds up a fork. He thinks it could be a forearm and fingers. Calvin continues digging. He can't wait to see what the complete Calvinosaur looks like. Hobbes notices the bones come in decorator colors.

Calvin looks at all the bones they dug up. He suggests they glue the parts together to see how they fit. Then, they'll draw a reconstruction of the dinosaur. After that, they'll write up their findings and be published in a scientific journal. They'll win the Nobel prize, get rich, and go on talk shows. Hobbes wonders about when they get babes.

Calvin finishes constructing the bones together how he thinks they should be. He asks Hobbes to draw the dinosaur as it really looked, with skin and muscles. Hobbes finishes the picture. Since the "dinosaur" has a Coke bottle for a skull, Hobbes' picture has the mouth open. Calvin wonders if it's whistling. Hobbes isn't sure, it might be puckering up.

Calvin shows Mom the skeleton he and Hobbes dug up. Calvin is going to call the Natural History Museum and offer it to them for ten billion dollars. Mom thinks those are peculiar bones. Calvin asks if he should ask for more money. That wasn't quite what Mom meant.

Calvin tells Hobbes that Mom doesn't think they found a skeleton at all. Mom says they just dug up some trash someone littered. Calvin says their dinosaur is a fraud. Hobbes laments that it wouldn't be right to sell the skeleton to a museum. Calvin suggests not at full price, anyway.