Scientists Discover That Turtles Began Living in Shells Much

Unique among Earth’s creatures, turtles are the only animals to form a shell on the outside of their bodies through a fusion of modified ribs, vertebrae and shoulder girdle bones. The turtle shell is a unique modification, and how and when it originated has fascinated and confounded biologists for more than two centuries.

Evolutionary 'trap' leading young sea turtles to ingest plastic, study says, Marine life

OFFICIAL Denver Museum of Nature & Science : Early Origins of Turtles

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Ancient giant sea turtle with never-before-seen features found in Europe, scientists say

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Green Turtle - National Maritime Historical Society

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Newly identified softshell turtle lived alongside T. rex and Triceratops

The remarkable tropical life of the Hawksbill sea turtle

A Beachcomber's Guide to Shells and other Wildlife Found on the Seashore - Marine Dimensions

Sea Turtles Smithsonian Ocean

10 totally awesome facts about turtles! - National Geographic Kids

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