Not Every Useful Trait Started for That Job
Some traits are exaptations. Evolution often repurposes old structures instead of inventing from scratch.Exaptations
A Head Built for Hiding Became a Glider
The African lizard Holaspis guentheri evolved an extremely flat head for hiding in crevices. In that species, the flattened head also helps it glide from tree to tree.Exaptations
