TIMELINE THE AGE OF DINOSAURS Dinosaurs roamed the Earth during a time known as the Mesozoic era which spanned approximately 251 to 65 mil lion years ago or mya Scientists divide the Mesozoic era into three periods the Triassic the Jurassic and the Cretaceous Dinosaurs first appeared during the Triassic period eventually becoming the dominant animals on land Dinos ruled from the start of the Jurassic period until the mass extinction at the end of the Cretaceous period which wiped out about three quarters of the species on Earth ISANOSAURUS TRIASSIC 251 200 MYA First appearance of dinosaurs pterosaurs turtles flies bony fish and mammals Dinos included Eoraptor Herrerasaurus Isanosaurus Coelophysis Plateosaurus and
JURASSIC 200 145 MYA First appearance of salamanders hermit crabs true lizards blood sucking insects and birds Dinos included Allosaurus Compsognathus Archaeopteryx Brachiosaurus Stegosaurus and Diplodocus STEGOSAURUS CRETACEOUS 145 65 MYA TYRANNOSAURUS REX First appearance of flowering plants bees ants snakes and termites Dinos included Spinosaurus Triceratops Ankylosaurus Corythosaurus Microraptor Argentinosaurus Velociraptor Maiasaura Pachycephalosaurus Troodon Tyrannosaurus and
CHAPTER 1 MEET SOME OF THE BIGGEST ANIMALS EVER TO HAVE ROAMED THE EARTH Most people know that dinosaurs were big But just how big did they get Try this on for size It would take you and more than 1 500 of your friends combined to reach the weight of the winner of this chapter Turn the page if you dare FUTALOGNKOSAURUS
