How the Squid Lost Its Shell

Season 1 Episode 38 | 8m 5s Video has closed captioning.

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.

Aired: 05/07/18

Rating: NR


Problems Playing Video? | Closed Captioning