into the air (Introduction)

by David Turell , Wednesday, October 24, 2012, 20:43 (4414 days ago)

Birds came from dinosaurs, who had feathers. but how to get airborne? No one yet knows. Here is a possibility:-
http://blogs.scientificamerican.com/observations/2012/10/23/reanalysis-of-four-winged-dinosaur-may-illuminate-evolution-of-bird-flight/?WT_mc_id=SA_DD_20121024