this post was submitted on 15 Nov 2023
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I don't think he would last long with our current oxygen levels, there is a reason why such giant creatures don't exist anymore.
On top of that like comments said if we just waited out he would starve to dead, even if we were not provided food.
*Edit
Well looks like I was wrong, thx for clarifying that out.
Really though the reason for big animals not being as prevelant anymore was really the oxygen levels Idk where I got that from.
But then it is really weird how the evolution meta didn't evolve back to the huge beasts we see on books, someone said in the comments that it was due to the mammals success, if so it puts things really into perspective.
The largest animal we have known to ever live is alive right now, the blue whale.
The ocean doesn't count
In this particular case, it does. Whales are air breathing mammals.
Yes, but they spend most of their lives under water, only coming up briefly to breathe. Being under several atmospheres of pressure changes your air requirements.
Whether those requirements go up or down, I'm not sure.