Sentences with word «bipedality»
Bipedality refers to the ability of an animal or human to walk on two legs. Full definition
(Even if it were true, it would not demonstrate (b), for reasons given in Lippard (1989 - 90)-- the knee joint is not the only evidence of bipedality in A. afarensis.)
talkorigins.org
Clemente thinks these lizards might have co-opted accidental bipedality for some advantage.
Later studies have honed in on traits such as bipedality, culture, language, humor, and, of course, a big brain as the unique birthright of our species.
This orientation «suggests bipedality,» says Juan Luis Arsuaga of the University of Madrid, although «the evidence is still weak» because so far it is based primarily on a single bone.
Then come bipedality, a complex material culture and our decidedly peculiar reproductive biology (where else in nature do you find permanent breasts, concealed -LSB-...]
After correcting for the lizards» overall size, the researchers found that bipedality did not improve endurance — in fact, the more bipedal the lizards were, the shorter their sprints.
Indeed, for some lizards, bipedality looked accidental, Clemente says.
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.
Assuming some variant of a chimpanzee - like ape ancestry, the bipedality of Au.
In addition to finally illustrating what the body of Poposaurus looked like, he says, the newly described specimen «helps us understand that transition to bipedality» among the rauisuchians.
He puts forward four scenarios: it could be (1) mosaic evolution (not all parts evolved at the same rate), or (2) parallel evolution (bipedality evolved more than once from closely related ancestors), or (3) convergent evolution (bipedality evolved quite independently, from quadrupedal ancestors), or (4) the australopithecines could be unrelated to human evolution at all.