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Prehistoric Life During the Triassic Period - Dinosaurs - About.com
A guide to the animals, plants, climate and geology of the Triassic period (250- 208 million years ago).
http://dinosaurs.about.com/od/dinosaurbasics/a/dinosaurages_2.htm
The First Mammals (Triassic, Jurassic, and Cretaceous) - Dinosaurs
The truth, though, is very different: in fact, the first mammals evolved from therapsids ("mammal-like reptiles") at the end of the Triassic period, and coexisted with ...
http://dinosaurs.about.com/od/otherprehistoriclife/a/earlymammals.htm
The Permian-Triassic Extinction Event - Dinosaurs - About.com
About 250 million years ago, at the end of the Permian period, over 90 percent of the earth's marine organisms went extinct, along with nearly three-quarters of ...
http://dinosaurs.about.com/od/dinosaurextinction/a/The-Permian-Triassic-Extinction-Event.htm
Triassic Period - Definition of the Dinosaur Phrase Triassic Period
The span of geologic time stretching from 250 to 208 million years ago. The first primitive dinosaurs evolved during the Triassic period, and flourished in the later  ...
http://dinosaurs.about.com/od/dinosaurbasics/g/triassic.htm
Earliest Dinosaur Evolution and Ancestors - Dinosaurs - About.com
Some time in the middle to late Triassic period, about 230 million years ago, the first dinosaurs evolved from their archosaur ancestors. Here's everything you ...
http://dinosaurs.about.com/od/dinosaurevolution/a/first-dinosaurs.htm
Prehistoric Crocodiles and Crocodile Evolution
Toward the end of the Triassic period, a family of archosaurs ("ruling lizards") evolved into the very first crocodiles. Here's the story the last 200 million years of  ...
http://dinosaurs.about.com/od/typesofdinosaurs/a/crocodilians.htm
Turtle Evolution - The Story of Prehistoric Turtles
In a way, turtle evolution is an easy story to follow: the basic turtle body plan arose very early in the history of life (during the late Triassic period), and has ...
http://dinosaurs.about.com/od/otherprehistoriclife/a/Prehistoric-Turtles-The-Story-Of-Turtle-Evolution.htm
Prehistoric Life During the Permian Period - Dinosaurs - About.com
The Permian period is when the first reptiles dominated the planet--not dinosaurs ... of therapsids spawned the very first mammals of the ensuing Triassic period.
http://dinosaurs.about.com/od/PaleozoicEra/a/Permian-Period.htm
Pterosaurs - The Flying Reptiles - Evolution - Dinosaurs - About.com
The evolution of pterosaurs roughly paralleled that of their terrestrial cousins, the dinosaurs, as the small, "basal" species of the late Triassic period gradually ...
http://dinosaurs.about.com/od/typesofdinosaurs/a/pterosaurs.htm
Periods of the Mesozoic Era - Evolution - About.com
A description of life and evolution during the Triassic, Jurassic, and Cretaceous periods of the Mesozoic Era.
http://evolution.about.com/od/LifeOrigins/tp/Periods-of-the-Mesozoic-Era.htm
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