Bakker in the Earth and Planetary Sciences department at Johns Hopkins University in Baltimore. Paul lacks a formal degree in paleontology, but has participated in numerous field expeditions and has authored or co-authored over 30 scientific papers and over 40 popular science articles. Paul proposed that some of the bird-like feathered theropods were winged fliers, and that others were secondarily flightless, an idea supported by some fossils from China. Paul proposed the controversial thermoregulatory concept of "terramegathermy", which argues that only animals with high basal metabolic rates can exceed one tonne on land. Paul has named the following dinosaurs, alone or with co-authors: Acrocanthosaurus altispinax (species, later renamed Becklespinax altispinax) Albertosaurus megagracilis (species, later renamed Dinotyrannus megagracilis, now considered a juvenile Tyrannosaurus rex) Aublysodon molnari (species, later renamed Stygivenator molnari, now considered a juvenile Tyrannosaurus rex) Avisaurus archibaldi (genus and species, with Brett-Surman; a bird) Giraffatitan brancai (genus) Mantellisaurus atherfieldensis (genus) Potamornis skutchi (genus and species, with Elzanowski & Stidham; a bird) Dollodon bampingi (genus and species) Books Predatory Dinosaurs of the World (1988) The Complete Illustrated Guide to Dinosaur Skeletons (1996) Dinosaurs of the Air (2002) The Princeton Field Guide to Dinosaurs (2010) Gregory S. Paul's Dinosaur Coffee Table Book (2010) The Princeton Field Guide to Pterosaurs (2022) The Princeton Field Guide to Mesozoic Sea Reptiles (2022) The Scientific American Book of Dinosaurs (editor, 2000) See also Dinosaur renaissance Feathered dinosaurs Paleoart Footnotes External links Official website American illustrators American paleontologists 1954 births Living people Scientific illustrators Paleoartists American atheists Critics of religions People from Washington, D.C.