By A Mystery Man Writer
For years, the oldest turtle fossils we could find had fully formed shells. Now, more primitive fossils are revealing the strange tale of how turtle shells evolved
Mystery of the Turtle Shell
It's turtles all the way down in the fossil record
Scientists Find Missing Turtle Link: 230-million-year-old Monster
How the turtle got its shell: Amazing fossils are solving the mystery
It's Turtles All the Way Down in the Fossil Record - The New York Times
The trouble with turtles: Paleontology at a crossroads
Turtles news, articles and features
How the turtle got its shell
Fossils reveal how the turtle got its shell, Science
9A: The Georgia Turtle - Supporting Science Education in Georgia
Turtle shell fossil? : r/fossilid