The Attachment Spandrel: A Speculation | Jean Mercer

When people talk about evolution of structures and functions or of behaviors through natural selection, they sometimes use an intriguing metaphor. They suggest that human evolution can have a an aspect that can be compared to a spandrel—an architectural feature like an arch that was originally developed as a way to support a building, but that later was liked for its attractive appearance and put to work as a way to decorate a structure. It seems possible that human evolutionary change involves spandrels too, with traits that began with one function later becoming useful in other ways. For…

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