Evolutionary biology. Uphill dash may have led to flight.
Pennisi
Elizabeth
E
D000818:Animals; D005075:Biological Evolution; D001696:Biomechanical Phenomena; D001717:Birds / Q000033:anatomy & histology / Q000254:growth & development / Q000502:physiology*; D025061:Dinosaurs / Q000033:anatomy & histology / Q000502:physiology; D005241:Feathers / Q000502:physiology; D005426:Flight, Animal; D005580:Fossils; D008124:Locomotion; D009068:Movement; D012420:Running; D016138:Walking; D014921:Wings, Animal / Q000502:physiology*