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
[–] [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.