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Line 3: − − [[Young Earth Creationism|Young Earth Creationists]] believe that they became extinct sometime since the [[Great Flood]], which was approximately 4,500 years ago.
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T-rex lived at the end of the [[Cretaceous]] period, approximately 70 to 65 million years ago, and that modern birds and dinosaurs such as T-rex share common ancestry. <ref>[http://www.cnn.com/2007/TECH/science/04/12/dinosaur.reut/index.html Bird Family Ties]</ref><ref>[http://www.livescience.com/animalworld/ap_trex_tissues.html T Rex Tissue]</ref>
T-rex lived at the end of the [[Cretaceous]] period, approximately 70 to 65 million years ago, and that modern birds and dinosaurs such as T-rex share common ancestry. <ref>[http://www.cnn.com/2007/TECH/science/04/12/dinosaur.reut/index.html Bird Family Ties]</ref><ref>[http://www.livescience.com/animalworld/ap_trex_tissues.html T Rex Tissue]</ref>
== Fossils ==
== Fossils ==