Enigmatic Tully Monster Finds a Home on the Tree of Life

How a 300-million-year-old mystery fossil is reshaping our understanding of what it means to be a vertebrate. by Kelsey Lucas figures by Brad Wierbowski Through murky water you spot it – a creature with a cylindrical body, tapering at each end like a football. At one end, a spade-like tail fin fans out as it slowly beats back and forth. At the other end, a … Continue reading Enigmatic Tully Monster Finds a Home on the Tree of Life