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Can a turtle tuck its head all the way inside its shell?

Turtle shells evolved over the course of 300 million years, but self-defense wasn't the initial driver, researchers think.
al.com

Endangered sea turtle with infection in shell gets second CT scan at Alabama hospital

An endangered sea turtle being treated for an infection in his shell at an Alabama natural science museum underwent his second CT scan Tuesday at Decatur Morgan Hospital, the museum announced. Kale, a ...