Board Thread:Suggestions/@comment-25118285-20170113233624/@comment-29659579-20170903004413

PCAwesomeness wrote: CactusKing wrote: But they weren't the same species were they? Because the genus Meganuera was used to 30% more O2 and couldn't have survived, the Permian species were built differently. Differently, schmifferently. All we have of them are large wings and some body fragments. Sure, they were many different genera from Meganeura (with the largest one 19 cm smaller than it as well), but it's just silly to assume that they had "oh so much different build" than the one we know the most about.

By this logic, I should be able to breathe in the thermosphere without help. A creature that lived with more oxygen would use more oxygen. A creature that didn't, wouldn't. But it's ridiculous to say that something that lived at a time with more oxygen would be able to survive normal, modern day, earth air. I'm not supporting the "high oxygen caused bugs to get large" theory, just saying that specific genus would likely suffocate today.