Exaptation
Version 1.0.0 · Updated 2026-07-28
CORE DEFINITION
A biological or technical trait originally evolved or invented for one function is later co-opted to serve a completely new function; an old structure gains new use in a new environment. Gould and Vrba introduced "exaptation" in 1982 to replace "pre-adaptation", which wrongly implied evolution pursued a predetermined goal. Feathers may have first evolved for insulation or courtship display and were later co-opted for flight; the mammalian middle-ear bones derive from bones of the ancestral jaw.
SCAFFOLDING EFFECT
Reduce cognitive load
- Function rediscovery: for existing assets, skills, or work in hand, ask "what new scenario could this serve" instead of using it only as designed. - Counter functional fixedness: features that look obsolete or useless may hold value in a new context. - Combinatorial innovation: combine several old traits to solve a problem none of them was designed for.
Anchor fast decisions
An existing trait originally serving function A is repurposed for function B due to a change in environment or need. Innovation need not come from designing from scratch; it often comes from repurposing what already exists — availability precedes purpose.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Exaptationverified
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