Paleontologists have just assembled the most comprehensive family tree of meat-eating dinosaurs. Published in the journal Current Biology, the family tree reveals how diverse carnivorous dinosaurs were and how birds eventually evolved from them.
Tyrannosaurs, including Tyrannosaurus rex, are one key group on the meat-loving dino family tree.
Lead author Steve Brusatte of the University of Edinburgh's School of GeoSciences told Discovery News, "The most iconic dinosaurs of all, tyrannosaurs were more than just the 13-meter-long (nearly 43 feet long), 5-ton monster predator T. rex. Tyrannosaurs were an ancient group that originated more than 100 million years before T. rex, and for almost all of their evolutionary history they were small carnivores not much bigger than a human in size."
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