Dinosaur. Dinosaurs are a diverse group of animals of the clade Dinosauria. They first appeared during the Triassic period, 231.4 million years ago, and were the dominant terrestrial vertebrates for 135 million years, from the beginning of the Jurassic (about 201 million years ago) until the end of the Cretaceous (66 million years ago), when the Cretaceous–Paleogene extinction event led to the extinction of most dinosaur groups at the close of the Mesozoic Era.
The fossil record indicates that birds evolved from theropod dinosaurs during the Jurassic Period and, consequently, they are considered a subgroup of dinosaurs by many paleontologists.[1] Some birds survived the extinction event that occurred 66 million years ago, and their descendants continue the dinosaur lineage to the present day.[2] Etymology Definition The common House Sparrow (Passer domesticus) is often used to represent modern birds in definitions of the group Dinosauria General description Distinguishing anatomical features. MayorSamos.pdf (application/pdf Object) MayorPlacenames.pdf (application/pdf Object) Adrienne Mayor. Adrienne Mayor (born 1946) is a historian of ancient science and a classical folklorist. Mayor specializes in ancient history and the study of "folk science": how pre-scientific cultures interpreted data about the natural world, and how these interpretations form the basis of many ancient myths, folklore and popular beliefs.
Her work in pre-scientific fossil discoveries and traditional interpretations of paleontological remains has opened up a new field within the emerging discipline of geomythology and classical folklore. Mayor's book on the origins of biological and chemical warfare revealed the ancient roots of poison weaponry and tactics. Since 2006, Mayor has been a research scholar in the Classics Department and the History and Philosophy of Science and Technology Program at Stanford University. Bibliography[edit] The First Fossil Hunters (2000, reissued with new Introduction 2011)[edit] Other highlights include: Fossil Legends of the First Americans (2005)[edit] Books[edit] Dragons a Fantasy made Real Documentary Part 1. MayorGeomythology.pdf (application/pdf Object)