A dusty fossil drawer held a 300-million-year-old evolutionary game-changer

A century-old fossil long mislabeled as a caterpillar has been reidentified as the first-known nonmarine lobopodian—rewriting what we know about ancient life. Discovered in Harvard’s museum drawers, Palaeocampa anthrax predates even the famous Cambrian lobopodians and reveals that these soft-bodied ancestors of arthropods once lived not only in oceans, but in freshwater environments too.