Flightless birds gave up flying after dinosaurs were wiped out
Monday, February 22, 2010 - 08:56
in Paleontology & Archaeology
(PhysOrg.com) -- Scientists have assumed the ancestors of modern flightless birds were also flightless, but results of new research suggests they only became flightless and began to explore the ground when it became safe to do so because the dinosaurs had been wiped out.