As a paleontologist, Jenny Clack wants to find the transitional form between fish and land vertebrates or tetrapods. She spent years teasing a fossil from its rock and studying the fish-like animal that shows evolution in mid-process during the Devonian. It was an animal with both gills and lungs. Out in the field, Dr. Clack tries to understand the lives of transitional forms by studying fossilized footsteps, “an action replay” from deep time.
Jenny Clack, Paleontologist: The First Vertebrate Walks on Land
Next Generation Science Standards for this Video
The fossil that Jenny Clack studies an extinct vertebrate by looking at its fossil.
A beautifully preserved tetrapod fossil provides evidence of adaptations that allowed vertebrates to invade land.
Jenny Clack studies a fossil tetrapod and its fossilized footprints and makes the connection between the two and explains how it walked on land.