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But the largest herbivores and carnivore were far larger than anything we have today, or even had before humans killed the megafauna.
Would animals have again become huge in a few tens of million years more?
https://en.wikipedia.org/wiki/Blue_whale The largest animal ever known is currently on Earth, though endangered.
Only because we perfected killing them only few hundreds years ago. If we had more time they'd be dead too!
๐จ๐จ๐จ Sorry Alan.
๐