In new research, paleontologists used synchrotron X-ray tomography of annual growth increments in the dental cementum of fossil mammals from three faunas across the Jurassic period to map the origin of patterns of mammalian growth patterns, which are intrinsically related to mammalian warm-bloodedness. Mammals in a Jurassic forest. Image credit: © Zhao Chuang. “This is the first time we’ve been able to reconstruct the growth patterns of these...
