US EditionWhy Have Birds Never Gotten as Big as T. Rex? - 3 Quarks Daily
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Why Have Birds Never Gotten as Big as T. Rex? - 3 Quarks Daily
Riley Black in Smithsonian Magazine: The repeated evolution of huge birds is part of the dinosaurian legacy. Beaked birds were the only dinosaurs to have survived the asteroid-triggered mass extinction at the end of the Cretaceous. Avians like the six-foot-tall Palaeeudyptes that waddled across ancient Antarctica about 30 million years ago and Titanis, a towering carnivore that was the only terror bird to live in North America between 1.8 millio…
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