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Brachydectes by NTamura on DeviantArt More info: spinops.blogspot.com/2014/12/b…

Brachydectes by NTamura on DeviantArt More info: spinops.blogspot.com/2014/12/b…

Shonisaurus, Late Triassic (215 Ma), Discovered by Camp - 1976;  Californosaurus (surrounding ichthyosaurs), Triassic (228-210 Ma), Discovered by Kuhn - 1934

Shonisaurus, Late Triassic (215 Ma), Discovered by Camp - 1976; Californosaurus (surrounding ichthyosaurs), Triassic (228-210 Ma), Discovered by Kuhn - 1934

Dinosaur/Human size chart by Hyrotrioskjan (i love the way the dude is all like "hey there, dinosaur!")

Dinosaur/Human size chart by Hyrotrioskjan (i love the way the dude is all like "hey there, dinosaur!")

pikaia - this extinct Precambrian animal is our earliest ancestor because he is the earliest chordate (animal with a notochord/backbone) found in the Burgess Shale.

pikaia - this extinct Precambrian animal is our earliest ancestor because he is the earliest chordate (animal with a notochord/backbone) found in the Burgess Shale.

Tylosaurus was a mosasaur, a large, predatory marine lizard closely related to modern monitor lizards and to snakes. It was a dominant predator of the Western Interior Seaway during the Late Cretaceous. Tylosaurus proriger was among the largest of all the mosasaurs, reaching lengths of over 49 feet.

Tylosaurus was a mosasaur, a large, predatory marine lizard closely related to modern monitor lizards and to snakes. It was a dominant predator of the Western Interior Seaway during the Late Cretaceous. Tylosaurus proriger was among the largest of all the mosasaurs, reaching lengths of over 49 feet.

Mosasaurs are often thought to be marine dinosaurs, but they are actually close relatives to today’s lizards and snakes.

Mosasaurs are often thought to be marine dinosaurs, but they are actually close relatives to today’s lizards and snakes.

Compsognathus - Greek for "pretty jaw." About the size of a chicken or turkey, it is one of the smallest known dinosaurs.

Compsognathus - Greek for "pretty jaw." About the size of a chicken or turkey, it is one of the smallest known dinosaurs.

Herrerasaurus Ischigualastensis - by paleoartist Vlad Konstantinov | related: http://en.m.wikipedia.org/wiki/Herrerasaurus_ischigualastensis

Herrerasaurus Ischigualastensis - by paleoartist Vlad Konstantinov | related: http://en.m.wikipedia.org/wiki/Herrerasaurus_ischigualastensis

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