Many birds survived the extinction of the dinosaurs, but not all. Some went extinct along with the non-avian dinosaurs, and scientists aren’t sure why. When an asteroid hit the Earth, tossing up dust into the sky, why did some winged creatures survive while others fell by the wayside?
A pair of new studies, based in part on the discovery of ancient baby bird feathers preserved in amber, suggest that a major factor lies in how the different bird groups molted.
