How the Squid Lost Its Shell | Eons

PBS Learning Media
Contributed By
PBS Learning Media
Resource Type
Classroom Material
Keywords
pbs digital studios eons science Cambrian period mollusks cephalopods Ediacaran Period complex animals Cambrian explosion mollusk evolution squid squid evolution body structures adaptation history of life geologic eras geologic periods geologic time geological history life on Earth geology natural history paleontology ancient life fossils fossil record evolution tree of life
Subjects
Science
Grade Levels
Grade 9 Grade 10 Grade 11 Grade 12
Related Resources

How the Squid Lost Its Shell | Eons

The ancestors of modern, squishy cephalopods like the octopus and the squid all had shells. In ancient times, their shell was their greatest asset but it eventually proved to be their biggest weakness.
Publisher
PBS Learning Media

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