Exciting new fossil find in South Africa

ComparisonofskullfeaturesofHomonalediandotherearlyhumanspecies2

An exciting new hominid fossil has been found in the deepest recesses of the Rising Star Cave, about 20 miles Northwest of Johannesburg, South Africa. http://www.cnn.com/2015/09/10/africa/homo-naledi-human-relative-species  The fossil remains include nearly complete skeletons of several individuals, and remains of at least 15 separate individuals, which is unusual because the more usual discovery is of isolated broken up crania only, with occasional other bits and pieces.  Though the find will not revolutionize science's ideas of how our species evolved, it gives a more complete picture of the basic pattern and raises interesting questions about the cognitive abilities of these possible ancestors of modern human beings.

The findings from the initial 2013 discovery and subsequent research were just announced by Dr. Lee Berger, Research Professor at the Evolutionary Studies Institute and the Center of Excellence in Paleoscience at Witwatersrand University in Johannesburg.   Berger has had a distinguished career in physical anthropology and human paleontology, having discovered, among other things, a new species of Australopithecene, Australopithecus sediba, in another South African cave in 2008.

The remains were found in a very deep recesses of Rising Star Cave, so far in that Berger had to employ especially thin people to reach them.  The positioning of the skeletons suggests that they may have been put there deliberately, but gives no clue as to why, when or by whom.  The remains, with their advanced degree of fossilization, probably will not lend themselves to carbon 14 dating, so it might be a while before we know what approximate dates to assign to them.

The remains themselves show a mixture of very ancient and more modern features.  The hands appear to be adapted for using tools, but the fingers also show curvature that suggests that they were capable tree-climbers.  The feet are very similar to those of modern human beings rather than apes.  The teeth include molars with smaller, human-like front teeth. The skulls look very much like those of the well-known Homo erectus, which lived in this part of Africa and also in Europe and Asia between 1.9 million and 200,000 years ago.  African variants of early Homo are sometimes called Homo ergaster, but many scientists now think that this is just a sub variety of Homo erectus.

However, the cranial capacity, meaning  brain size, of the individuals is considerably smaller than the average for other Homo erectus populations.  This and other factors led Lee and his team to propose that this is actually a different Homo species, which they are calling Homo naledi.  But this set off a controversy.  In recent years, some scientists have been complaining that the way fossil hominid remains have been classified and named underplays the degree of anatomical variety found in any one species.  So the designation of the skeletons as Homo naledi and not just as a subgroup of the old familiar Homo erectus, is being met with some skepticism.   Unfortunately, with remains that have reached an advanced state of fossilization, it is impossible to do DNA analysis which might resolve this question.  However, Berger's team will try.

Some reports express surprise at the placing of the remains in the furthest recesses of the cave.  It looks deliberate, but did small brained beings like these have the capacity to carry out deliberate burials with some sort of symbolic meaning? 

Well, why not? Even the species generally acknowledged to have preceded Homo erectus, the smaller-brained Homo habilis, is known to have made and used simple tools, and others of the Homo erectus/Homo ergaster complex made more sophisticated ones.  Also, there are indications that the erectus/ergaster knew the use of fire and may even have had the beginnings of speech and language capacity.  So it seems no big to stretch to think that they may have had some deliberate way of disposing of their dead. Yet the idea has been suggested that the skeletons were those of individuals killed by more modern human types who then stashed the bodies in the cave.  To me, this seems very speculative.

Anyway, the find is stunning because of the number of individuals and the completeness of their remains.  It does not radically change the overall understanding of how and where human beings evolved:  This probable progression still holds:  A split from the line that evolved into chimpanzees and bonobos perhaps ten million years ago, Sahelanthropus in what is now Chad dated at about 7 million years ago; then varieties of the genus Ardepithecus in East Africa about 4 ½ million years ago, and Australopithecus (several species) in East and Southern Africa about four million years ago. The first member of the genus Homo, Homo habilis, our first known tool making ancestor, appears on the scene in Eastern and Southern Africa perhaps 2.8 to 1.5 million years ago, followed by the Homo erectus/Homo ergaster complex.  Anatomically modern human beings appeared in East Africa around 200,000 years ago.  Both erectus/ergaster and modern Homo sapiens had African origins from which they spread to Asia and Europe, and then Homo sapiens all over the globe.

The overall pattern since the split from the ancestors of chimpanzees and bonobos has involved the development of erect bipedal posture, tool making, beginnings of language and increased cranial capacity.  In all likelihood, increased sociality-the ability to function as an organized social group-developed along with all this, and the full development of modern brain capacity followed behind the rest, as postulated long ago by Friedrich Engels, Marx's collaborator and alter ego.  https://www.marxists.org/archive/marx/works/1876/part-played-labour/

So the development of human sociality was the force driving the development of the modern human being, anatomically, cognitively and emotionally.

Or to quote a familiar Zulu saying from another area of South Africa:  "Umuntu ngumuntu ngabantu".  "A person becomes a person through (other) people".  This originally referred to how we are socialized, but turns out to be applicable to how we evolved as well.

Image: Comparison of skull features of early human species.  Wikimedia  Creative Commons 4.0

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  • More on the comment of 6 days ago: Marx in his '44 Manuscripts(Economic and Philosophical Manuscripts of 1844) writes of "species-being"-a kind of stamp of identity for humankind, marked by our practice of transforming inorganic matter, through labor, to organic matter, to make ourselves our species.
    This species actualization happens as humans work as a group, and is transformed by group activity. However, as capitalism makes the sum of transformed inorganic matter PRIVATE PROPERTY, and not the social, communistic property it was at its genesis and through its sociality, the identity of humankind is alienated through what young Marx called a "third form" of alienation(the first form humanity's alienation from product, the second form, from activity, and the fourth form, from humankind itself).
    Humankind is transformed, not knowing what it is because it is subject to the wild and seemingly disorderly forces it, itself is conjuring up-that is before it becomes conscious of itself as humankind, returning its private property and life identity, or "species-being", to social, communistic property, from whence it came.
    Human sociality makes us anatomically, cognitively and emotionally-as brother Schepers writes- independent of our will(s).
    At a certain point, by virtue of the shear power of the productive process, the "species-being" itself becomes transformed itself-to a more developed species. The "boom" of this process, and the evolution of "booms" as events we do not control, only stop when we control them, to halt this iron rule of "forces of production" over our lives, returning, converting, private property to social or common property, also gaining our species identity.

    Posted by E.E.W. Clay, 09/29/2015 1:12pm (2 years ago)

  • Fine work, Emile, in interpreting scientific evidence, not simply describing it, as mainstream capitalist media does. You are bringing into the 21st century a contention used by Marx, Engels, and progressive American scholars like Sociologist Lester Ward against "Social Darwinism" that destructive distortion of Darwin's theory of evolution. Humanity and human progressive development through social relations and higher levels of cooperative labor, advanced though technological breakthroughs and, as systems became stagnant, social revolutions, not through competition and survival of the "fittest," where the superior and the stronger destroyed the inferior and weaker, all to the good, regardless of the social cost. Those "theories" have been recycled with a vengeance today
    Norman Markowitz

    Posted by Norman Markowitz, 09/26/2015 11:31am (2 years ago)

  • In Marx's very interesting and famous Manuscripts of 1844, he emphasizes the social nature of material production in making people who they are.
    The lines between tool making people and tool making beast were historically and anthropologically certainly sharpened by social production-"Umuntu ngumuntu ngabantu".
    These sharp lines by no means indicating that these two processes did not condition one another-or, in the grand scheme of things, CAUSE one another.
    Moreover, the human family, as Marx held with the American Morgan's work and matrilineal gens discovery, has moved through orderly productive processes, with certain core material needs being met before it could reach successive stages: savagery, barbarism and civilization.
    The sometimes violent booms that come with human progress seem oftentimes hidden by unseen past material production asserting itself-much in the same way that these discovered fossils are asserting human, necessarily social, activity and production.

    Posted by E.E.W. Clay, 09/23/2015 11:17am (2 years ago)

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