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Ferns’ ability to evolve ‘backward’ offers insights into the meandering path of evolution

  • Written by Jacob S. Suissa, Assistant Professor of Plant Evolutionary Biology, University of Tennessee
Ferns’ ability to evolve ‘backward’ offers insights into the meandering path of evolutionUnfurling fiddlehead of the Christmas fern (_Polystichum acrostichoides_).Jacob S. Suissa, CC BY-ND

Imagine a photograph of your great-grandparents, grandparents and parents side by side. You’d see a resemblance, but each generation would look distinct from its predecessors. This is the process of evolution in its simplest form: descent with...

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