For over a century, a fossil discovered during the Civil War era was mistakenly identified as a seaworm. In reality, it’s a rare arthropod ancestor—and the first known example of a sea creature lineage moving onto land. U-M researcher Richard J. Knecht uncovered the fossil’s true identity, offering a breakthrough in evolutionary biology. In this Michigan News spotlight, Knecht shares how the discovery reshapes our understanding of marine evolution.
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