Cretaceous Period - Ch. 5 - Episode 2 Confusion
- Thread starter MangaDex
- Start date
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- Jul 23, 2020
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- 106
Finally, we're getting to the good part
@Odat Actually, current studies say oxygen levels were slightly under today's levels except toward the end of Cretaceous during the ages the dinosaurs lived. What likely attributed to their sizes were instead their blow-through type lungs like the ones birds have, in contrast to the more inefficient pumping lungs of mammals...
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