Paleontology. First upright vertebrate lived fast, died young.
Stokstad
E
E
D000818:Animals; D005075:Biological Evolution; D005552:Forelimb / Q000033:anatomy & histology; D005580:Fossils; D005858:Germany; D006614:Hindlimb / Q000033:anatomy & histology; D008124:Locomotion; D011187:Posture; D012104:Reptiles / Q000033:anatomy & histology* / Q000502:physiology; D012420:Running; D013623:Tail / Q000033:anatomy & histology