There is already evidence which shows that humans appeared in the fossil record before the australopithecines and lived as contemporaries with the australopithecines throughout all of australopithecine history. Although brain organization is more important than brain size alone, the significant gap between cranial capacities of the largest australopithecine and the smallest human has not been bridged. There is no smooth transition from nonhuman to human fossils in this regard. The evidence for australopithecine bipedality is controversial. First it should be noted that bipedality does NOT indicate a human relationship.
Birds are bipedal, but no one suggests that they are closely related to humans.
Evolutionists make much of the alleged australopithecine bipedality because to make a case for human evolution they must demonstrate the origin of bipedality from a primate stock. This brings us to the infamous Laetoli footprints, discovered by associates of Mary Leakey beginning in 1978, thirty miles south of Olduvai Gorge in northern Tanzania. These footprint trails, preserved in fresh volcanic ash by a unique combination of circumstances, are one of the greatest fossil discoveries of the twentieth century. Three parallel trails are seen, made by three individuals, with one individual walking in the footprints of another. There are a total of sixty-nine prints extending a length of about thirty yards.