The biological mystery of how turtles evolved their shells twice
In short: Turtles have spent over 260 million years perfecting their armor. This video explores the evolutionary history of the shell, examining how diverse structures emerged to suit different environments.
The turtle shell is a masterpiece of adaptation, with modern varieties ranging from the flat, lightweight shells of sea turtles to the domed structures of land-dwelling tortoises. Some species, like the leatherback, even lack the typical ring of bone around the shell's edge.
By tracing the ancestry of the turtle, the video explains how these distinct forms evolved over a quarter-billion years. It highlights the evolutionary pressure to survive varied habitats, from gliding through water to escaping the jaws of predators.
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Sources
- Summary by Intellect · source: How turtle shells evolved... twice - Judy Cebra Thomas
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