Posted on 03/09/2005 12:36:05 PM PST by Heartlander
With all due respect, I read both sides, and I know whos's nutty and who's witty. Check Panda's Thumb response to Berlinski.
People see what they want to see and disregard the rest...[simon and garfunkle]:
Yet another alleged early human ancestor unearthed
by guest columnist Peter Line, Ph.D.
11 March 2005
It seems these days that there are precious few ordinary human or ape fossils unearthed, rather they all have to be a missing link between the two. The latest contender for apeman fame, this time as the worlds oldest early human skeleton or oldest walking hominid,1 consists of bones from a site in the northeastern Afar region of Ethiopia, dated at between 3.8 to 4 million years ago. The remains include a complete tibia and shoulder blade, as well as parts of a femur, ribs, vertebrae, collarbone and pelvis, as well as an ankle bone. The fossil remains of up to 11 other individuals are also reported to have been found. As the finds have not been published in a journal, nor been reviewed by outside scientists, it is difficult to make an assessment of the find at this stage, except what can be interpreted from a few quotes from hominid fossil experts released to the media.
It is stated that Scientists are yet to classify the new find, which they believe falls between A. ramidus and A. afarensis. The fossils would help join the dots between the two hominids, said Yohannes Haile-Selassie, an Ethiopian scientist and curator at the Cleveland Museum of Natural History as well as a co-leader of the discovery team.2 Falling between Australopithecus ramidus and Australopithecus afarensis (e.g. Lucy) hardly boosts its status as a missing link hominid. According to Peter Andrews, of Londons Natural History Museum, the thin enamel on the teeth of ramidus is more of what youd expect from a fossil chimp, and the features of an upper arm bone suggests knuckle-walking, chimp-style.3 Even the team that discovered ramidus admits that the specimen shows a host of characters usually associated with modern apes.4
As for the younger and hence supposedly more evolutionarily advanced afarensis, it had a brain the size of an ape; a skull that was apelike; a body similar in shape and stature to apes; and other parts of its skeletal morphology indicate that it was specialized for climbing in trees, as well as knuckle-walking, as are apes.5 Much has been made of skeletal features indicating afarensis may also have had limited ability for (non-human-style) bipedal locomotion. However, similar limited bipedal ability also existed in apes not considered human precursors, such as Oreopithecus bambolii, evolutionary dated to earlier than the supposed human and chimpanzee split. According to the authors who studied the specimen, parts of the pelvis of bambolii resembled that of afarensis, and its femur showed a pronounced diaphyseal angle combined with condyles of subequal size, similar to Australopithecus and Homo and functionally correlated with bipedal activities.6 According to Henry Gee, This creature is thought to have become bipedal independently and was only distantly related to hominids.7 Apes evolving a form of bipedal locomotion once is difficult enough to believe or imagine; that it must have independently happened multiple times, in order to rescue evolutionary theory, reveals evolution to be a collection of just-so-stories that can be accommodated to almost any scenario, no matter how unlikely.
This brings us to the big claim concerning this new fossil find. That is, that the ankle bone
, with the tibia, proves the creature walked upright, said Latimer, co-leader of the team that discovered the fossils.2 Whether this is the case or not cannot be assessed on the information available. Even the morphology of the skeleton is not known, but since the specimen is placed between ramidus and afarensis then one must assume that it was essentially apelike. Hence, even if this creature had some form of limited bipedal ability, as may have been the case with afarensis, it proves very little, as this trait, as indicated by the nonancestral ape bambolii, was not unique to these supposed hominids. One should also be wary of claims that this or that skeletal feature proves the creature walked upright, as usually some other evolutionist fossil expert will debunk or dispute the claim. As examples of this, Ardipithecus ramidus kadabba and Orrorin tugenensis come immediately to mind.5
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