Re: terminal velocity not changed.
Actually I think it does. Terminal velocity is the speed at which the forces imparted by drag and wind resistance plus friction exactly matches the force of Gravity pulling an object down. If the force of Gravity is 3.33 M/s/s then the opposing force of drag + wind + friction also only needs to equal 3.33 M/s/s. Ergo, terminal velocity would be slower.
I get what you say. I was thinking more in terms of gravity acting upon an object in a vacuum as opposed to gravity acting upon an object in any given atmosphere and its property’s.
Of course since these creatures did not operate in a vacuum, that is mute I guess.