Anatomy analysis suggests new dinosaur family tree
Proposal would radically alter century-old groupings

NEW WAY TO RELATE The dinosaur evolutionary tree just got a makeover. One outcome of the proposed rearrangement is that meat-eating evolved twice in dinosaurs (in groups represented by Tyrannosaurus rex, bottom middle, and Staurikosaurus, right), as did traits associated with plant-eating (groups represented by Brontosaurus, left, and Triceratops, top middle).
Clockwise from left: Matt Wedel/Wikimedia Commons (CC BY 4.0); Allie_Caulfield/Wikimedia Commons (CC BY-SA 3.0); Kabacchi/Wikimedia Commons (CC By 2.0); David Monniaux/Wikimedia Commons (CC By-SA 2.0 FR)
This article is only available to Science News subscribers.
Subscribers, enter your e-mail address to access our archives.
