They reason backwards: Birds evolved, therefore some poorly understood mindless processes must have driven them to evolve.
News from Princeton discusses the work of Tom Smith and Bridgett vonHoldt, who have solved a “long-standing finch beak mystery.” The answer turned out to be Mendelian, not Darwinian.
Living things are on the move everywhere. Why do some of them go to great lengths to migrate, while others stay put?
Another study of bird migration using geolocators finds fascinating new facts about social interactions during long-distance flights.
I hardly dared to dream that, as an early Christmas present, 2017 would close with a final blow to the Out of Africa story.