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An ancient ocean reveals a surprising twist in evolution

Fossils from Colombia’s Paja Formation reveal an ancient ocean where lineages nearing extinction lived alongside newer groups beginning to thrive. Researchers from McGill University and the Centro de Investigaciones Paleontológicas call this kind of evolutionary turning point a “Biotic Inflection.” Warm waters, rising sea levels, nutrient-rich coasts and new ocean connections may have helped support this remarkable diversity of marine life. The idea suggests that some major evolutionary changes may unfold without mass extinction, though more fossil evidence is needed to see how widespread this pattern was.
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