this post was submitted on 15 Nov 2023
497 points (96.6% liked)
4chan
4221 readers
186 users here now
Greentexts, memes, everything 4chan.
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
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.