this post was submitted on 15 Nov 2023
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T-Rex problems (i.imgur.com)
submitted 1 year ago by [email protected] to c/4chan
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[–] [email protected] 3 points 1 year ago

Iirc oxygen levels were lower in the Late Cretaceous than they are today. Also, it is likely saurischian non-avian dinosaurs breathed more like their living bird relatives, which is a lot more efficient, thus allowing for a larger size.