neandertal
cagapakis | May 29, 2010I had the pleasure of chatting with John Hawks about the two big science news stories of the past few months, the synthetic genome and the Neandertal genome, for Science Saturday at bloggingheads.tv.
John is a professor of anthropology at the University of Wisconsin who studies population genetics of ancient humans, as well as a terrific teacher. I learned a lot of really fascinating things about how people study fossils and trace human evolution and it was interesting to find some connections between the two stories! As he mentions on his blog, we didn't once mention synthetic Neandertals…
cwilcox | May 6, 2010This week, Science published two papers about the genetics of Neandertals from a team of scientists based at the Max Planck Institute of Evolutionary Anthropology. The first (which is the only one anyone seems to really care about) gives a draft version of the entire Neandertal genome - a whopping 4 billion base pairs of DNA. They use this information to look for genomic regions that may have been affected by positive selection in ancestral modern humans that led to their separation from Neandertals, and found some very interesting ones that include genes involved in metabolism and in…
razib | March 15, 2010The Middle-to-Upper Palaeolithic transition in Cova Gran (Catalunya, Spain) and the extinction of Neanderthals in the Iberian Peninsula:
The excavations carried out in Cova Gran de Santa Linya (Southeastern PrePyrenees, Catalunya, Spain) have unearthed a new archaeological sequence attributable to the Middle Palaeoloithic/Upper Palaeolithic (MP/UP) transition. This article presents data on the stratigraphy, archaeology, and 14C AMS dates of three Early Upper Palaeolithic and four Late Middle Palaeolithic levels excavated in Cova Gran. All these archaeological levels fall within the 34-32 ka…
razib | February 15, 2010One of the great things about science is that old orthodoxies regularly get overturned; it's not a bug, it's a feature. Of course the personal downside is that it means models which scholars have invested their lives and intellectual capital into may turn out to be unsupportable, but at the end of the day it's not about everlasting fame, but the real world as it was and is and will be. Paradigm shifts are kind of like a box of new chocolates, you never know what new inferences will be generated. Thinking deeply again becomes a surprise.
In The New York Times John Noble Wildford has an…
razib | February 10, 2010Archaeology has a very interesting piece up, Should We Clone Neanderthals?. It begins with the nitty-gritty of ancient DNA extraction & sequencing, moves to the possible avenues of cloning, and of course the bioethical conundrums that we might be placed in. I know that there is an expectation that a neo-Neandertal will be some sort of "ape-man," but we should remember that the ancient Neandertals had greater cranial capacities than modern humans. I suspect thought that the biggest issue for a neo-Neandertal might be disease; "savages" brought back to Europe invariably died from Illnesses…
razib | January 26, 2010The debates about the timing of the extinction of the last Neandertals in Iberia seem to one of those interminable disagreements around which paleoanthropologists can't ever reach a resolution. Another offering from PLoS ONE, Pego do Diabo (Loures, Portugal): Dating the Emergence of Anatomical Modernity in Westernmost Eurasia:
Methodology/Principal Findings
Using AMS radiocarbon and advanced pretreatment techniques, we dated a set of stratigraphically associated faunal samples from an Aurignacian III-IV context excavated at the Portuguese cave site of Pego do Diabo. Our results establish a…
razib | January 12, 2010Symbolic use of marine shells and mineral pigments by Iberian Neandertals:
Two sites of the Neandertal-associated Middle Paleolithic of Iberia, dated to as early as approximately 50,000 years ago, yielded perforated and pigment-stained marine shells. At Cueva de los Aviones, three umbo-perforated valves of Acanthocardia and Glycymeris were found alongside lumps of yellow and red colorants, and residues preserved inside a Spondylus shell consist of a red lepidocrocite base mixed with ground, dark red-to-black fragments of hematite and pyrite. A perforated Pecten shell, painted on its external…
razib | January 5, 2010Dental maturational sequence and dental tissue proportions in the early Upper Paleolithic child from Abrigo do Lagar Velho, Portugal:
Neandertals differ from recent and terminal Pleistocene human populations in their patterns of dental development, endostructural (internal structure) organization, and relative tissue proportions. Although significant changes in craniofacial and postcranial morphology have been found between the Middle Paleolithic and earlier Upper Paleolithic modern humans of western Eurasia and the terminal Pleistocene and Holocene inhabitants of the same region, most…
razib | October 27, 2009Dr. Thomas Mailund has posted a YouTube interview of Svante Paabo. Looks like the previous post was off-base, though I'm not really totally sure.
razib | October 26, 2009Neanderthals 'had sex' with modern man:
Professor Svante Paabo, director of genetics at the renowned Max Planck Institute for Evolutionary Anthropology in Leipzig, will shortly publish his analysis of the entire Neanderthal genome, using DNA retrieved from fossils. He aims to compare it with the genomes of modern humans and chimpanzees to work out the ancestry of all three species.
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Paabo recently told a conference at the Cold Spring Harbor Laboratory near New York that he was now sure the two species had had sex - but a question remained about how "productive" it had been.
"What I'm…
razib | September 21, 2009Two papers in PNAS this week.
Human origins: Out of Africa:
Our species, Homo sapiens, is highly autapomorphic (uniquely derived) among hominids in the structure of its skull and postcranial skeleton. It is also sharply distinguished from other organisms by its unique symbolic mode of cognition. The fossil and archaeological records combine to show fairly clearly that our physical and cognitive attributes both first appeared in Africa, but at different times. Essentially modern bony conformation was established in that continent by the 200-150 Ka range (a dating in good agreement with dates…
razib | September 15, 2009The origin of Neandertals:
Western Eurasia yielded a rich Middle (MP) and Late Pleistocene (LP) fossil record documenting the evolution of the Neandertals that can be analyzed in light of recently acquired paleogenetical data, an abundance of archeological evidence, and a well-known environmental context. Their origin likely relates to an episode of recolonization of Western Eurasia by hominins of African origin carrying the Acheulean technology into Europe around 600 ka. An enhancement of both glacial and interglacial phases may have played a crucial role in this event, as well as in the…
razib | July 20, 2009Shanidar 3 Neandertal rib puncture wound and paleolithic weaponry:
Since its discovery and initial description in the 1960s, the penetrating lesion to the left ninth rib of the Shanidar 3 Neandertal has been a focus for discussion about interpersonal violence and weapon technology in the Middle Paleolithic. Recent experimental studies using lithic points on animal targets suggest that aspects of weapon system dynamics can be inferred from the form of the bony lesions they produce. Thus, to better understand the circumstances surrounding the traumatic injury suffered by Shanidar 3, we…
razib | April 21, 2009Neandertal birth canal shape and the evolution of human childbirth:
Childbirth is complicated in humans relative to other primates. Unlike the situation in great apes, human neonates are about the same size as the birth canal, making passage difficult. The birth mechanism (the series of rotations that the neonate must undergo to successfully negotiate its mother's birth canal) distinguishes humans not only from great apes, but also from lesser apes and monkeys. Tracing the evolution of human childbirth is difficult, because the pelvic skeleton, which forms the margins of the birth canal,…
razib | April 15, 2009Genetic Evidence of Geographical Groups among Neanderthals:
The Neanderthals are a well-distinguished Middle Pleistocene population which inhabited a vast geographical area extending from Europe to western Asia and the Middle East. Since the 1950s paleoanthropological studies have suggested variability in this group. Different sub-groups have been identified in western Europe, in southern Europe and in the Middle East. On the other hand, since 1997, research has been published in paleogenetics, carried out on 15 mtDNA sequences from 12 Neanderthals. In this paper we used a new methodology…