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Prehistoric Life During the Cretaceous Period - Dinosaurs - About.com
The Cretaceous period is when dinosaurs attained their maximum diversity, as ornithischian and saurischian families branched off into a bewildering array of ...
Raptors - The Bird-Like Dinosaurs of the Cretaceous Period
Raptors came into their own during the late Cretaceous period (about 90 to 65 million years ago), but they roamed the earth for tens of millions of years before ...
Mosasaurs - The Marine Reptiles of the Late Cretaceous Period
These sleek, reptilian predators may have been responsible for the extinction of the ichthyosaurs by the end of the Cretaceous period (not necessarily by eating ...
Cretaceous Period - Definition of the Cretaceous Period
The Cretaceous Period (144 - 65 Myr BP) is the third of three periods during the Mesozoic Era. It is preceded by the Jurassic Period and followed by the Tertiary ...
The First Mammals (Triassic, Jurassic, and Cretaceous) - Dinosaurs
The Early Mammals of the Triassic, Jurassic and Cretaceous Periods .... Eomaia, from the early Cretaceous period, and Cimolestes, from the late Cretaceous ...
Prehistoric Sharks and Shark Evolution - Dinosaurs - About.com
Prehistoric sharks really came into their own during the middle Cretaceous period, about 100 million years ago. Both Cretoxyrhina (about 25 feet long) and ...
Prehistoric Crocodiles and Crocodile Evolution
Of all the reptiles alive today, crocodiles and alligators may be the least changed from their prehistoric ancestors of the late Cretaceous period, over 65 million ...
Turtle Evolution - The Story of Prehistoric Turtles
Until recently, fossil evidence linking the land-dwelling Eunotosaurus and the giant, marine turtles of the late Cretaceous period was sorely lacking. That all ...
Titanosaurs - The Last of the Sauropods
By the end of the Cretaceous period, the only sauropods left standing were the titanosaurs--mysterious, armored plant-eaters whose partial skeletons have been  ...
Snake Evolution - The Story of Prehistoric Snakes - Dinosaurs
Today. the prevailing view is that snakes evolved from an as-yet-unidentified land -dwelling (and probably burrowing) lizard of the early Cretaceous period, most ...
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