How the Squid Lost Its Shell

Eons

17th April 2018 10 mins Season 2 Episode 14

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.

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Season 2 · Episode 15

How the Chalicothere Split In Two

Two extinct relatives of horses and rhinos are closely related to each other but have strikingly different body plans. How did two of the same kind of animal, living in the same place, end up looking so different?

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