Homo erectus
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Homo erectus is an extinct hominid species that originated in East Africa about 1.8 to 1.9 million years ago. They survived until at least 800,000 years ago although some researchers put the date of their extinction as recently as 70 thousand years ago or less. Found in Africa, Asia, and possibly Europe, they were the most far-ranging hominid species to have existed before Homo sapiens and the first to come out of Africa.
This species is credited with significant advances in the use of stone tools including the earliest hand axes, [1] cleavers, and other large cutting tools. They used fire, ate meat, and hunted. [2] They were likely capable of speech, and evidence indicates they cared for their old and weak.
The species was discovered by Eugene Dubois in Java, Indonesia, in 1891. The "Turkana Boy" or "Nariokotome Boy" fossil, discovered by R. Leakey and A. Walker at Nariokotome, Kenya, in 1984, is the most complete early human skeleton ever discovered. It is approximately 1.6 million years old, though it may have been Homo ergaster, the identification of which scientists disagree pending further evidence. Million and a half year old footprints found in Kenya by Rutgers University's John Harris on February 27, 2009, left clues to the nature of the Homo erectus gait and the structure of its foot.
Homo erectus is likely a descendant as well as a contemporary of Homo habilis, and the entire population appears to have gradually evolved into Homo sapiens. Some researchers identify the early African material as Homo ergaster. Fossils from China may be referred to as "Peking man" and those from Indonesia as "Java man."
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[edit] Physical characteristics
Homo erectus demonstrates transitional features between australopithecines and modern humans. An individual could resemble a robust modern human at about 4' 9" to 6' 1" in height and about 88 to 150 pounds with decreased sexual dimorphism compared to earlier hominids. It is likely that his growth rate was similar to that of great apes and that he was largely hairless. The increase in brain size from the australopithecines to approximately 900-930 cc nonetheless represents a significant statistical difference from that of modern humans, which is approximately 1350 cc, and he therefore had lower mental ability than do modern humans.
Features of the skull, jaw, and teeth were transitional between australopithecines and modern humans. There were noticeable differences between the neck and spine of this species and those of modern humans. The chest was more barrel-shaped rather than the funnel-shaped chest of australopithecines. The pelvis might have been narrower than that of modern humans, indicating a smaller infant brain size.
Although Homo erectus walked and ran bipedally on the ground, his gait was not as efficient as that of modern humans. His feet had a combination of early hominid and human traits. His arms and legs were similar to those of modern humans.
[edit] Creationists on
In order to maintain their claim that men appeared suddenly and without prior evolutionary history, it is necessary for creationists to identify early hominid fossils as being either "fully human" or "fully ape." [3] However, there is a lack of agreement between them as to which fossils to call ape and which to call human. [4] An Answers in Genesis article notes that Homo erectus was traditionally placed with apes, however more recently tends to be placed with humans. [5] It is also interesting to note that the author admits he disagrees with creationist Marvin Lubenow about where to place Homo habilis.
To demonstrate that Homo erectus is fully human, the website "Darwinism Refuted" claims, "There is no difference between the postcranial skeleton of modern man and that of Homo erectus." [6] In addition to admitting that there are differences in the skulls, this statement ignores differences such as those in the neck, spine, pelvis, feet, growth rate, and others noted by paleontologists. As further evidence that Homo erectus was human, the website presents a recent photograph of a guy with a sloping forehead and additionally a supportive quote from Lubenow, a young Earth creationist per CreationWiki.
The author of the above-mentioned AIG article notes one G. I. Beasley's speculation that apparent differences between Homo erectus fossils and modern human skeletons could be caused by "prolongation of skeletal maturation and greater longevity potential; environmental; and dietary/pathological pressures within a post-Deluge framework." The author goes on to proclaim, "Beasley's paper is a land- mark in creationist research on this subject, and every Christian should possess a copy with which to question materialist-minded educators." Beasley's essential "research" referenced is an essay titled "A possible creationist interpretation of archaic fossil human remains" that appeared in the Journal of Creation in 1992. Greg Beasley is an engineering analyst with Sydney, Australia's, CityRail. [7]
The AIG article poses the question of how, given that Homo erectus was supposed to have evolved into Homo sapiens, do anthropologists "reconcile the presence in Australia of both modern sapiens types and erectus types all within the last 35,000 years?" In fact, although the Kow Swamp people mentioned do bear a superficial resemblance to Homo erectus, it is not the scientific consensus that this indicates the species existed in Australia at this late date. [8]
The AIG article uses the gradual evolution from Homo erectus to Homo sapiens as evidence that they are the same species. Additionally both this article and the above-mentioned "Darwinism Refuted" webpage refer to the minority opinion of paleoanthropologist Milford Wolpoff that the species Homo erectus is redundant and that for taxonomic reasons it should be sunk into Homo sapiens. Both of these arguments fail to recognize the clear differences between the species.
AIG further makes the claim that the creationist view would eliminate any perceived confusion regarding the species making up the genus Homo. The author notes, "On the other hand, if creationists are right in believing that earth has only a short history (measured in millennia, rather than millions of years), then there would be no argument - all forms of Homo (except the phantom-like H. habilis), would form just a single contemporary species." This logic demonstrates the creationist tendency to seek evidence that supports the conclusion rather than to let the evidence lead to it.
In another AIG article we find the creationist explanation for the existence of Homo erectus fossils. Therein the author reasons that at the time of Babel humans must have looked like Homo erectus, since he was the first hominid to spread out over the Earth and the Bible indicates that humans did not do so until after the flood. The article also claims, "Aside from the skull, Homo erectus skeletons are virtually indistinguishable from modern humans, so the evidence indicates they are human." [9] The fallacies involved in these arguments include the observation that Homo erectus could not possibly have had the culture described in the relevant Bible passages. For a more in-depth examination of the fallacies involved in this article, check out the link at this footnote. [10]
[edit] See also
- Jesus erectus
- Missing link
- The EvoWiki article on Homo erectus
[edit] External links
- O'Neil, Dennis (1999-2010). "Homo erectus."
- "Kow Swamp: is it Homo erectus?" talk.origins. Apr. 28, 1997.
- "Java Man and Turkana Boy." talk.origins. Apr. 28, 1997.
- "Creationist Arguments: Peking Man." talk.origins. Apr. 30, 2001.
- "Creationist Arguments: Java Man. talk.origins. Aug. 11, 2005.
- "Creationist Arguments: Homo erectus." talk.origins. Sept. 23, 2003.
- Brace, C. Loring (Apr. 30, 2001). "Creationists and the Pithecanthropines." talk.origins.
[edit] Footnotes
- ↑ Homo erectus
- ↑ Homo erectus was pretty smart already judging by evidence that fire had been discovered over 1.6 million years ago
- ↑ Bowden, Malcolm (1988). "Homo erectus--A Fabricated Class of 'Ape-Men'."
- ↑ "Comparison of all skulls." talk.origins. Oct. 28, 2008.
- ↑ Mehlert, A. W. (Apr. 1994). "Homo erectus 'to' modern man: evolution or human variability?."
- ↑ "The Origin of Man: Homo erectus." Darwinism Refuted.
- ↑ "Darwin Doubters of the Twentieth & Twenty First Century."
- ↑ "Kow Swamp." Peter Brown's Australian & Asian Palaeoanthropology.
- ↑ "Lucy Was Buried First: Babel Helps Explain the Sequence of Ape and Human Fossils." Answers in Genesis. 2009.
- ↑ Brayton, Ed (Aug. 22, 2008). "The Sadness of Kurt Wise." ScienceBlogs