It's possible that, among our earlier, knuckle - walking ancestors, males who stood upright more habitually were better competitors and mated more, leading to our fully
bipedal species.
Our ancestors, going back to the genus Australopithecus, used infant carriers to adapt carrying strategies for infants who could not effectively cling and to reduce the energetic costs of carrying as
a bipedal species.
Not exact matches
Santa and Jesus are both omnivorous
bipedal primates of the
species H sapiens.
In 1991, William Hammer, an NSF - funded researcher hunting for fossils in Antarctica's Beardmore Glacier region, discovered this skull (left) and a large femur, which belonged to a completely unknown
species of therapod — a
bipedal, carnivorous dinosaur whose members include the more familiar tyrannosaurs and Velociraptors.
«Since her
species was already
bipedal and already had reduced canines, those characteristics were not the result of adaptation to savanna,» White says.
The fossils discussed in the paper are of dinosaurs of the
species Ornithomimus edmontonicus, which means they looked something like modern ostriches, and are theropods —
bipedal and carnivorous — as are most of the feathered dinosaurs already known to science.
Previous research has investigated the biomechanics of ground - dwelling birds to better understand the how
bipedal non-avian dinosaurs moved, but it has not previously been possible to empirically predict the locomotive forces that extinct dinosaurs experienced, especially those
species that were much larger than living birds.
«Foot fossils of human relative illustrate evolutionary «messiness» of
bipedal walking: Study of Homo naledi suggests that new
species walked upright and also climbed trees.»
Our results are consistent with considerable body size variation and, probably, degree of sexual dimorphism within a single
species of
bipedal hominins as early as 3.66 million years ago.
Though one or two holdouts still resist the idea, it is now widely accepted that birds evolved from the group of
bipedal theropod dinosaurs that includes Deinonychus, Tyrannosaurus, Velociraptor, and other familiar
species.
Discovered by Donald Johanson at Hadar in Ethiopia in 1974 and nicknamed «Lucy» this fossil was the most complete skeleton and oldest member of what was then known of the human lineage but numerous scientists disputed she was truly
bipedal, stating this
species practiced a form of locomotion intermediate between the quadrupedal tree climbing of chimpanzees and human terrestrial bipedality.
So why would some
species of octopus — creatures that have no bones to support their bodies — set two arms on the ground and take a
bipedal - style ramble to flee from a predator?