Dinosaurs are a diverse group of reptiles[note 1] of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago,[1][2] although the exact origin and timing of the evolution of dinosaurs is the subject of active research.[3] They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201 million years ago; their dominance continued through the Jurassic and Cretaceous periods. Reverse genetic engineering[4] and the fossil record both demonstrate that birds are modern feathered dinosaurs,[5] having evolved from earlier theropods during the late Jurassic Period.[6] As such, birds were the only dinosaur lineage to survive the Cretaceous–Paleogene extinction event 66 million years ago.[7] Dinosaurs can therefore be divided into avian dinosaurs, or birds; and non-avian dinosaurs, which are all dinosaurs other than birds. This article deals primarily with non-avian dinosaurs.
8 comments
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1 Vandrewver 2019-05-07
Way too normal looking. I mean, we all know what Lawlz looks like.
1 DeathBahamutXXX 2019-05-07
lol like a /r/drama user is a PoC
1 mitusus 2019-05-07
I feel so seen right now.
1 LikeTotesObvi 2019-05-07
get out of my head
1 Do_a_pushup 2019-05-07
But birds are dinosaurs.