These insects keep evolving to look like sticks. Why?

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Stick insects keep evolving to have the same strange body plans over and over again, scientists have discovered. This evolutionary blueprint has enabled researchers to predict the critters’ next developments.

Researchers identified just 20 distinct body types that hundreds of different stick insect species have independently evolved. These body types include the “tree lobsters,” which have lobster-like features; the “bark huggers,” which blend in with a tree; and the “large-headed sticks,” which have massive jaws or mandibles.

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