The 500 Million Year History of Vertebrates

A velociraptor is a dinosaur.

Sauropsids could not run very fast, so some of them evolved a hole in their hip socket that helped them have legs that went straight down from their bodies instead of out to the side. These animals are dinosaurs.

Did you know that all birds are considered dinosaurs? Birds evolved from the common ancestor of all dinosaurs, just like humans evolved from the common ancestor of all mammals.

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Why would legs that go straight down to the ground be a helpful adaptation for dinosuars?

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Legs that go straight down help dinosaurs run quickly. Why would this help them?

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Dinosaurs have legs that go straight down from their hip socket, which helps them run faster. Moving more quickly helps them either run away from predators or hunt down their prey.

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