The Riddle of the DinosaurThe most pressing unanswered riddles about the great reptiles that ruled the Earth for 160 million years and then vanished 65 million years ago are discussed in this book, along with such other contemporary paleontological issues as the origin of flight, whether dinosaurs were cold- or warm-blooded and the extent to which their infant care approached that of mammals. |
From inside the book
Results 1-3 of 23
Page 27
... crocodile or a monitor lizard . By November 1821 , when he apparently wrote the section on the Tilgate fossils for The ... crocodiles , though they differed " in many important par- ticulars from the recent species . " Whatever they were ...
... crocodile or a monitor lizard . By November 1821 , when he apparently wrote the section on the Tilgate fossils for The ... crocodiles , though they differed " in many important par- ticulars from the recent species . " Whatever they were ...
Page 33
... crocodiles ; the teeth of lizards are attached directly to the jawbone . After Buckland cited anatomical reasons why this was not just an ancient crocodile , however , he failed to pursue the matter , never appreciating the importance ...
... crocodiles ; the teeth of lizards are attached directly to the jawbone . After Buckland cited anatomical reasons why this was not just an ancient crocodile , however , he failed to pursue the matter , never appreciating the importance ...
Page 187
... crocodiles and birds , as well as some notable birdlike features of Sphenosuchus , a late - Triassic ( 220 million years ago ) creature that is thought to be a primitive crocodile or a thecodont well on the way to being a crocodile ...
... crocodiles and birds , as well as some notable birdlike features of Sphenosuchus , a late - Triassic ( 220 million years ago ) creature that is thought to be a primitive crocodile or a thecodont well on the way to being a crocodile ...
Common terms and phrases
Alvarez Alvarez hypothesis American Museum Andrews animals appeared Archaeopteryx archosaurs asteroid Bakker bipedal birds boundary brontosaurs Buckland carnivores catastrophe claws coelurosaurs comets Como Bluff Compsognathus Cope creatures Cretaceous-Tertiary crocodiles Cuvier Darwin Deinonychus digging dino dinosaur bones dinosaurian Diplodocus discovered discovery Douglass earth ectotherms eggs endothermic evidence evolution evolutionary evolved expedition exploration feathers fossil hunters fossil record geologic geologists hadrosaurs Hatcher Hell Creek Horner human Hutton Huxley hypothesis Iguanodon impact iridium Jensen John Ostrom Jurassic known land layer living lizard looked mammals Mantell Marsh mass extinctions Megalosaurus Mesozoic meters million years ago Mongolia Montana Muller Natural History nest orbit Osborn Ostrom Owen paleontologists plants predators probably pterosaurs quarries remains reptiles reptilian rock sandstone sauropods saurs scientific scientists sediments seemed Sepkoski skeleton skull species specimens star Stegosaurus Sternberg strata survived teeth thecodonts theory therapsids tion Triassic Tyrannosaurus University vertebrate warm-blooded Williston wrote