Sounds like a bumblebee story and a lack of acceptance that we still have lots to learn, being so big with wing spans up to 11m how did pterosaurs fly?
Basically because their bones were hollow, few examples remain for study also they’ve been compared to birds so estimates of weight hugely vary. We do know they had a highly developed respiratory system with lungs and air sacks. Also they had elasticated skin opposed to feathers, with the ability to adjust the angle of the front of their wings they were well equipped, Southampton University students are currently developing 3d models in order to fill in the missing gaps…

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