Three hundred eighty-five million years ago, two separate lineages of armored fish arrived independently at different solutions to the same predatory challenge — how to crush hard-shelled prey in the competitive seas of the Devonian period. Recent paleontological research, examining fossilized jaw structures with new precision, reveals that these placoderms did not converge on a single optimal design but instead refined two mechanically distinct crushing systems in parallel. Their story is a reminder that evolution, when pressed by competition and opportunity, does not seek one answer — it see