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Perhaps the most unusual thing about Utahraptor, aside from its size, is when this dinosaur lived: about 125 million years ago, during the early Cretaceous period. Most well-known raptors (like Deinonychus and Velociraptor) flourished toward the end of the Cretaceous period, more than 50 million years after Utahraptor's day had come and gone, a reversal of the usual pattern in which small progenitors give rise to plus-size descendants.

10 Facts About Utahraptor, the World's Largest Raptor

10 Facts About Utahraptor, the World's Largest Raptor: Fact - Utahraptor Lived During the Early Cretaceous Period

tyrannosaurus rex - Google-Suche

Tyrannosaurus Rex attacking two Struthiomimus dinosaurs Poster Print x

Yangchuanosaurus by pheaston

Yangchuanosaurus by pheaston

The "unusual, horrible hands" dinosaur, Deinocheirus mirificus, had eight foot long forearms. And now scientists think it looks something like this.

Mystery of giant arm dinosaur solved

The "unusual, horrible hands" dinosaur, Deinocheirus mirificus, had eight foot long forearms. And now scientists think it looks something like this.

Luis Rey Sauropods | Thursday, September 24, 2009

A brief description with facts about the Diplodocus extinct dinosaur

Sarcosuchus imperator

In the prehistoric ages, most animals were much bigger than today's counterparts. Here is the top 6 biggest prehistoric crocodiles ever lived.

Um estudo publicado nesta segunda-feira (6) revelou que as grandes espécies animais que habitavam a Austrália na pré-história foram extintas por mudanças climáticas naturais, sem nenhuma intervenção significativa por parte do ser humano. A lista de espécies gigantes inclui o maior marsupial da história, o Diprotodon – que tinha o tamanho de um rinoceronte –, um leão marsupial de grande porte e um canguru “tão grande que nem temos certeza de que conseguia saltar”,

The marsupial lion (Thylacoleo carnifex) is an extinct species of carnivorous marsupial mammal that lived in Australia from the early to the late Pleistocene years ago). By Peter Schouten # creature animals

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