Still one may wonder why the entire suite of traits are not found in modern populations, but consider that Neanderthals typically lived in extremely cold climate areas, genetically isolated by a post-flood ice age. That would have directly affected their anatomy and physiology (Stringer and Gamble, 1993).
Two ecological rules describe the relationship between the size and the shape of the extremities (limbs) and trunk anatomy. Burgmann's rule regarding surface area postulates that body weight tends to be larger in cold climates. With two bodies of similar shape, the larger will have less surface area per unit of volume and will retain heat better in cold climates. Allen's rule suggests that body limbs will be shorter in cold climates, reducing surface area that results in less heat loss. This is seen in the short tails, ears, or beaks in many animals living in cold climates. Humans that live in cold climates, such as Eskimos, are typically larger with shorter arms and legs. Since Neanderthals lived in near arctic conditions in many cases, one would expect them to have a stocky body build and short extremities (arms and legs) (Holliday, 1997). In fact, the limbs of Neanderthals from the warmer climates of Southwest Asia are relatively longer than the limbs of those living in ice-age Europe. When Neanderthal limb proportions, based on a mean index of tibia/femur length, called Crural Index, are plotted against mean annual temperatures. Neanderthals appear to be even more cold-adapted in their limb proportions than modern Eskimos and Lapps (Stringer and Gamble 1993; Stringer and Mckie, 1996).
In addition, Neanderthals lived a life style that put rigorous demands on their bodies as seen from numerous skeletal lesions, many the result of traumatic bone breakage. (Trinkaus and Shipman, 1992.) Further, it has recently been suggested, based on intense dental study, that Neanderthals may have had a greater longevity than modern populations. This may have also affected their anatomy (Cuozzo, 1998).
Table
Neanderthal Culture
There are a large number of cultural habits that distance Homo sapiens from animals. No other organisms, either living or fossil, made tools to make other complex tools, buried their dead, had controlled use of fire, practiced religious ceremonies, used complex syntax in their spoken grammar, and played musical instruments, yet we know from their fossils that Neanderthal engaged in all.
Deliberate burial of Neanderthal remains is well known from at least 36 sites with a geographical distribution over most of Eurasia (Gowlett, 1994), with at least 20 complete skeletons known (Lewin, 1998). Some graves have stone tools, animal bones, and flowers buried in the ground, along with the Neanderthal remains. At the Uzbekistan Neanderthal site of Teshik-Tash, is a boy's grave surrounded by a ring of mountain goat bones, horns, and levallois tools indicating ritualism of some sort. Burial is known to have occurred in an unnatural posture, which demonstrates that a corpse was not simply dropped into a hole in the earth without preparation (Trinkaus and Shipman, 1992). Burial implies an awareness of the after life and demonstrates the existence of formal ritual. Indication of strong social ties can be inferred from cases where Neanderthal individuals with severe crippling injuries were cared for (i.e., the Shanidar remains).
In 1996, pristine evidence of Neanderthal humanness came to light, when a cave in Slovenia produced a small flute made from the thigh bone of a cave bear. Four precisely aligned holes are punctured on one side of the four-inch-long bone (Folger and Menon, 1997). Thus cultural evidence strongly supports Neanderthal humanness.
Neanderthal (mitochondrial) DNA
The recent recovery of mitochondrial DNA from the right humerus of the Neanderthal remains from Neander Valley near Dusseldorf, Germany, has been of great interest to evolutionists and creationists alike (Krings et al., 1997).
Based on the comparison of modern human mt DNA and that taken from the Neanderthal, evolutionists have argued that the "Neanderthal line" diverged from the line of "hominids" leading to modern humans about 600,000 years B.P. without contributing mt DNA to modern Homo sapiens populations. This strongly implies that Neanderthals were a different species from modern humans.
However, the above noted interpretation is not scientifically justified. Lubenow (1998) has pointed out that the use of a statistical average of a large modern human sample (994 sequences from 1669 modern humans) compared with the mt DNA sequence from one Neanderthal is not appropriate. Furthermore, the mt DNA sequence differences among modern humans range from 1 to 24 substitutions, with an average of eight substitutions, whereas, the mt DNA sequence differences between modern man and the Neanderthal specimen range from 22 to 36 substitutions, placing Neanderthals, at worst, on the fringes of the modern range.
Conclusion
Neanderthals were human. They buried their dead, used tools, had a complex social structure, employed language, and played musical instruments. Neanderthal anatomy differences are extremely minor and can be for the most part explained as a result of a genetically isolated people that lived a rigorous life in a harsh, cold climate.
References
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* Dave Phillips earned the M.S. in physical anthropology from California State University, Northridge, in 1991 and is now working on his Ph.D. in paleontology.
