Posted on 02/15/2006 11:47:51 AM PST by truthfinder9
by Fazale (Fuz) R. Rana, Ph.D.
Where were you on September 1, 2005? Perhaps you missed the announcement of a scientific breakthrough: the influential journal Nature published the completed sequence of the chimpanzee genome.1
This remarkable achievement received abundant publicity because it paved the way for biologists to conduct detailed genetic comparisons between humans and chimpanzees.2
Unfortunately, the fanfare surrounding the chimpanzee genome overshadowed a more significant discovery. In the same issue, Nature published a report describing the first-ever chimpanzee fossils. This long-awaited scientific advance barely received notice because of the fascination with the chimpanzee genome. News of the two discoveries produced different reactions among scientists. Evolutionary biologists declared the chimpanzee genome as evidence for human evolution, but some paleoanthropologists were left wondering how humans and chimps could have evolved, based on where the chimpanzee fossils were found.
According to the evolutionary paradigm, humans and chimpanzees share a common ancestor. About 5 million years ago, this ancestral primate spawned two evolutionary lineages that led to humans and chimpanzees. Anthropologists consider the physical, geographical separation of hominids and proto-chimpanzees to be the "driving force" for the evolution of humans and chimpanzees. They postulate that the formation of the Rift Valley isolated the hominids in East Africa (a hot, dry savannah) from chimpanzees in Central and West Africa (with warm, wet jungles). The geographical isolation of hominids and chimps, presumably, sent these two lineages along different evolutionary trajectories.
Evolutionary biologists think that fossil hominids like "Lucy," Homo erectus, and Neanderthals document the emergence of humans.4 Yet, until recently paleoanthropologists had no corresponding fossils for the chimpanzee lineage.
Surprisingly, the first chimpanzee fossils were discovered not in West or Central Africa, but in East Africa, near Lake Baringo, Kenya. These fossils, consisting of three teeth, dated to 500,000 years in age--meaning that chimpanzees coexisted alongside hominids. The Rift Valley provided no geographical rift for separate evolutionary histories, and therefore foils a key prediction of the human evolutionary paradigm.
Sally McBrearty, one of the paleoanthropologists who uncovered the chimpanzee fossils, noted, "This means we need a better explanation of why and how chimps and humans went their separate evolutionary ways. The discovery that chimps were living in semi-arid conditions as well as in the jungles seems to blow apart the simplistic idea that it was the shift to the savannah that led to humans walking upright."5
If the discovery blows apart a "simplistic idea," maybe it's time for a simple (and testable) idea--the RTB creation model for human origins.
Brokeback Planet of the Apes PING!
Cheers!
Have you tried the Phoenix Zoo? :-)
Cheers!
Hey, check out this site.
Cheers!
I'll see you and raise you a Japheth.
Isn't it about time to invent wine, now?
Or did the Beer Conversation from Hophead and Pissant supplant it?
Although we are different, it has yet to be conclusively demonstrated that humans and chimps really are of different species.
No doubt we all look different, but if you can produce a guy like Ted in the wild, the suggestion is the separation is not yet complete.
|
|||
Gods |
Blast from the Past. Just adding to the catalog, not sending a general distribution. |
||
· Mirabilis · Texas AM Anthropology News · Yahoo Anthro & Archaeo · · History or Science & Nature Podcasts · Excerpt, or Link only? · cgk's list of ping lists · |
HA!! Thanks for the grin today... :-)
Unless this Einstein has made an error quoting the paper, the fact that chimp fossils were found half a million years ago is irrelevant to the primate split 5 million years ago.
Or maybe the author is suggesting some kind of time-travel paradox.
Sally McBrearty, one of the paleoanthropologists who uncovered the chimpanzee fossils, noted, "This means we need a better explanation of why and how chimps and humans went their separate evolutionary ways. The discovery that chimps were living in semi-arid conditions as well as in the jungles seems to blow apart the simplistic idea that it was the shift to the savannah that led to humans walking upright."
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.