How did dinosaurs 'proto fly'? Possibly like this

How did dinosaurs 'proto fly'? Possibly like this Tiny parrotlets take wing like Archaeopteryx might have, and how future robots still could More at https://www.nsf.gov/discoveries/disc_summ.jsp?cntn_id=242053&WT.mc_id=USNSF_1 This is an NSF Discoveries item. Save   Follow NSF:    Save This email was sent using GovDelivery, on behalf of: National Science Foundation Update · 4201 Wilson Boulevard · Arlington, VA 22230 · 703-292-5111