An article published in the journal “Proceedings of the Royal Society B: Biological Sciences” reports evidence that pterosaurs were able to fly from birth. Dr. David Unwin, a paleobiologist at the University of Leicester, and Dr. Charles Deeming, a zoologist at the University of Lincoln, studied fossil pterosaur embryos at the base of the idea that they could fly only after they grew and compared them with embryos of birds and crocodiles concluding that they were only at the beginning of their development. The discovery in China and Argentina of fossil embryos that were about to hatch provided evidence that pterosaurs could fly from birth.