Dinosaurs were vertebrate animals that dominated the terrestrial ecosystem for over 160 million years, first appearing approximately 230 million years ago. At the end of the Cretaceous period 65 million years ago, dinosaurs suffered a catastrophic extinction, which ended their dominance on land. Taxonomists consider modern birds to be the direct descendants of theropod dinosaurs.

Since the first dinosaur was recognized in the 19th century, mounted, fossilized dinosaur skeletons have become major attractions at museums around the world. Dinosaurs have become a part of world culture and remain consistently popular, especially among children. They have been featured in best-selling books and films such as Jurassic Park, and new discoveries are regularly covered by the media.

The term dinosaur is sometimes used informally to describe other prehistoric reptiles, such as the pelycosaur Dimetrodon, the winged pterosaurs and the aquatic ichthyosaurs, plesiosaurs and mosasaurs, although technically none of these were dinosaurs.

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hot chicks in Jettas is a law like water, or dinosaurs!!! haha
Josh_MKB24 (Josh Morey) Sun, 20 Dec 2009 18:34:14 -0000
hot chicks in Jettas is a law like water, or dinosaurs!!! haha
There's candy cane in the dinosaurs mouth
MichelleWolfe88 (Michelle Wolfe) Sun, 20 Dec 2009 18:32:25 -0000
There's candy cane in the dinosaurs mouth
RT @voidspace: "Dinosaurs were made up by the CIA to discourage time travel" <--- I'm going to use that one.
elpargo (elpargo) Sun, 20 Dec 2009 18:31:34 -0000
RT @voidspace: "Dinosaurs were made up by the CIA to discourage time travel" <--- I'm going to use that one.
RT @DanielFlorien: Extinct ibex is resurrected by cloning http://bit.ly/6ZlZGC #science ...and maybe one day: Dinosaurs!!!
joshelgin (Josh Elgin) Sun, 20 Dec 2009 18:31:21 -0000
RT @DanielFlorien: Extinct ibex is resurrected by cloning http://bit.ly/6ZlZGC #science ...and maybe one day: Dinosaurs!!!
Mario has consumed my life once again...killing turtles and fighting giant, angry dinosaurs for the next hour
gbread312 (Gina Fazzini) Sun, 20 Dec 2009 18:19:14 -0000
Mario has consumed my life once again...killing turtles and fighting giant, angry dinosaurs for the next hour
Walking with dinosaurs- - Siemens Arena (part 2 of 3): Walking with dinosaurs- Vilnius- Siemens Arena Pasivaikš.. http://gxukp.tk
VilniusNews (Live Online Vilnius) Sun, 20 Dec 2009 18:16:21 -0000
Walking with dinosaurs- - Siemens Arena (part 2 of 3): Walking with dinosaurs- Vilnius- Siemens Arena Pasivaikš.. http://gxukp.tk

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