The century-long fight over how turtles evolved to have shells

Turtles were at the center of a hundred-year evolutionary controversy since the 1887 discovery of a Proganochelys fossil in Germany. AS PBS Eons explains, the question of how turtles got their shells led scientists "to rethink the entire history of reptile evolution."

Bonus video: sea turtles eat jellyfish like spaghetti:

How the Turtle Got Its Shell (YouTube / PBS Eons)

Image: Pexels

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