https://agnosticweb.com/ An Agnostic's Brief Guide to the Universe en 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

]]> https://agnosticweb.com/index.php?id=11325 https://agnosticweb.com/index.php?id=11325 Wed, 24 Oct 2012 19:43:00 +0000 IntroductionDavid Turell