It was an extremely important find: Hadrosaurus was one of the first nearly complete dinosaur skeletons found (the first was in 1834, in Maidstone, Kent, England), and it was clearly a bipedal creature.
These fossils were dated to approximately 4.2 million years ago, were classified in the species Au. anamensis, and were clearly megadont (possessing large teeth), bipedal, small-brained precursors of the Hadar and Laetoli hominids.
The discovery of these multiple remains gave the first hint that at least some dinosaurs may have traveled in groups and showed clearly that some dinosaurs were bipedal (walking on two legs).
Finally, although our results clearly demonstrate that human-like bipedal kinematics had evolved by 3.6 Ma, the Laetoli prints cannot provide detailed information regarding the locomotor mechanics of earlier hominins.
With three telltale toemarks on each print, the tracks clearly belonged to a major group of bipedal, carnivorous dinosaurs called theropods.
Moreover, botanical, faunal, and geological evidence associated with very early fossil hominids in Ethiopia and Kenya intimate a forested environment, a discovery that clearly constrains hypotheses explaining the success of the bipedal adaptation.
Thus, the acute impact of intense exercise training on ankle muscle co-activation and ankle muscle coordination patterns during mono- and bipedal stance needs to be more clearly disentangled.
Whereas Effigia had a toothless beak, Irmis points out, Poposaurus had sharp, recurved teeth and was clearly a carnivore like other rauisuchians, "so it shows poposauroids became bipedal before they evolved an herbivorous habit".
In the four patients who had bipedal MR lymphography five minutes after the injection of Gadodiamide, the lymphatics and lymph nodes were clearly visible.
