domingo, 20 de fevereiro de 2011

Anthropologists Trace Human Origins Back To One Large Goat

'Wait, That Can't Be Right,' Scientists Say
FEBRUARY 17, 2011 | ISSUE 47•07

Researchers say their goat-human evolution theory, on second thought, does feel a little off.

NEW YORK—An international team of anthropologists announced Monday it had traced the lineage of Homo sapiens back to a single large Pliocene-era goat.

"We have mapped out each of the diverse branches of the human family back to the dawn of our species," Douglas Ochs of Columbia University said, "and found that the common ancestor of all living humans was an immense and cognitively advanced goat that roamed the earth 3.4 million years ago, foraging for…uh…"

"Hmm," added Ochs, pausing for a moment. "You know what? Now that I'm actually saying it out loud, it's starting to sound a little weird. Am I…is this the right research paper?"

After staring down at his notes and then quickly shuffling through some files, a visibly flustered Ochs called for aides to cut the looping CGI animation projected behind him, which showed several horned proto-humans covered in thick full-body coats of mohair walking across an African savanna.

Anthropologists claim the early human pictured above "subsisted largely on...wait, is that really the right picture?"

"If everyone could just give me a minute—this all made sense when we started the conference," Ochs said. "Kevin, can you hand me that folder?"

Funded by a grant from the Smithsonian Institution, the 17-year inquiry into the origins of the human race brought together 12 top anthropologists from around the world to pursue the single-large-goat theory, which participants in Monday's presentation assured audience members "felt more plausible when we came up with it, really it did."

The landmark study culminates in this week's release of a 270-page report explaining the structure of prehistoric humans' short, upturned woolly tails and identifying the roots of early Indo-European† language in goat bleating, which, Ochs stated, "maybe [they] should have double-checked real quick" before the paper went to publication.

"There may be some slight inconsistencies in a few of our results, but I assure you these bone samples and behavioral analyses are all, well…look, I'm not going to stand here and tell you they're not a little ridiculous-looking," said Regina Hubbard-Price, associate director of the American Anthropological Association. "Obviously, with hindsight, yes, it's somewhat odd that our theory presupposes complex hunter-gatherer societies composed of large, 250-pound bipedal goat-men. But a lot of thought went into this, I swear."

"Maybe we should have listened to Cliff [Geertz] back at the beginning when he kept emphasizing that humans don't look like goats," Hubbard-Price added.

As their colleagues huddled together and whispered behind them, researchers from Australia and Japan explained how one 6-foot-tall goat with a hominid skeletal structure spawned numerous goat-human hybrids over a period of 1.8 million years. In a series of PowerPoint slides, they then showed that our ancestors used their prehensile upper lips to perform basic agricultural tasks and stomped out crude pottery with their cloven feet, theories that team members stopped reading aloud to the assembled audience almost immediately after reaching the words "cloven feet."

"Okay, so I'm reading this now, and it says, 'After trotting out of Africa nearly 2 million years ago, our earliest ancestors used their strong hooves and hindquarters to climb up steep mountain slopes in search of delicious moss,'" said British anthropologist Oliver Cranmore, reading from the report and shaking his head. "The thing is, I think I actually wrote that part. And I remember feeling very confident and excited about it at the time. This is weird."

After opening the floor to questions, researchers said they were now able to pinpoint what should have been warning signs that their findings were problematic, such as the moment 10 years ago when none of them could account for why present-day humans don't have horns, or the realization in the spring of 2004 that goats today exhibit virtually no humanlike characteristics whatsoever.

In spite of such incongruities, most of the scientists maintained that much of the physical evidence appeared to corroborate the goat- human connection, from countless Paleolithic cave paintings of goats, to the fact that many of man's earliest gods and demons took the form of goats, to colleague Lou Samedi's narrow, pointy beard.

"You know what? This might actually still be right," said University of California professor Han Choi, leafing through printouts of data. "Some male goats can reach almost 160 pounds, and that's pretty close to a normal-sized man."

"So, if you think about it," Choi added before trailing off. "Hold on, sorry."

L'Anthropologie

terça-feira, 15 de fevereiro de 2011

Journal of Human Evolution


International Journal of Osteoarchaeology


A Lucy já caminhava como o homem moderno

Australopithecus afarensis tinha o pé arqueado
IN CiênciaHoje 2011-02-11

Osso descoberto é um metatarso.

Um osso de um pé de uma espécie de hominídeo de há 3,2 milhões de anos, à qual pertencia a famosa Lucy, uma antepassada do Homo sapiens, revela que a espécie andava bem sobre as pernas. Os resultados da descoberta são publicados hoje, na revista «Science».

Um trabalho de investigadores norte-americanos cita a forma de um osso do pé fossilizado encontrado na Etiópia demonstra que os australopithecus afarensis tinham os pés arqueados como o homem moderno. O osso descoberto, em Hadar, é um metatarso, parte do pé situada entre o tarso e o dedo.
Para um dos autores da investigação, o paleontólogo William Kimbel, "o desenvolvimento de um pé arqueado assinala uma mudança fundamental na evolução da condição humana", já que representa "o desaparecimento da capacidade de uso do dedo grande do pé" por parte dos australopithecus afarensis para "se pendurarem nos ramos".

"O que indica que tinham finalmente abandonado a vida nas árvores para viver no solo", sustentou. Com um pé arqueado, os australopithecus afarensis podiam, sem problemas, explorar o campo e deixar a floresta em busca de alimento.

O Australopithecus afarensis viveu na África há mais de três milhões de anos e tinha cérebros menores e mandíbulas mais fortes que o homem moderno. Antes deles, registos fósseis revelaram que no Quénia e na Etiópia viveu o Australopithecus anamensis, há 4,2 milhões de anos.

Ainda anteriormente, o Ardipithecus ramidus, o mais antigo ancestral humano, vivia da Etiópia há 4,4 milhões de anos. Embora as espécies fossem bípedes, passavam a maior parte do tempo em árvores e os seus pés ainda tinham características mais semelhantes aos dos primatas como os chimpanzés.

sexta-feira, 11 de fevereiro de 2011

Ciclo de Conferências "Territórios de Fronteira em Arqueologia"


Irá decorrer às 17 horas do próximo dia 3 de Março de 2011 novo ciclo Territórios de Fronteira co-organizado pelo Grupo de Estudos em Evolução Humana (GEEVH), pelo Museu Nacional de Arqueologia (MNA) e pelo Núcleo de Arqueologia e Paleoecologia da Universidade do Algarve (NAP).

O ciclo inclui palestras de Catarina Tente (Docente na Faculdade de Ciências Sociais e Humanas da Universidade Nova de Lisboa) com As comunidades camponesas alto-medievais na bacia do Alto-Mondego; João Tereso (Doutorando em Biologia na Faculdade de Ciências da Universidade do Porto) com A agricultura Romana no Norte de Portugal: o contributo de novos estudos de arqueobotânica; e Cleia Detry (pós-doutoranda no Centro de Arqueologia da Universidade de Lisboa - UNIARQ) com A alimentação de Cristãos e Muçulmanos no Castelo de Palmela: uma perspectiva zooarqueológica.

Conjuntamente com o novo ciclo Territórios de Fronteira co-organizado pelo Grupo de Estudos em Evolução Humana (GEEVH), pelo Museu Nacional de Arqueologia (MNA) e pelo Núcleo de Arqueologia e Paleoecologia da Universidade do Algarve (NAP) será oferecido um certificado de participação.

Convidamo-vos todos a aparecer no MNA e assistir a este ciclo!

quinta-feira, 10 de fevereiro de 2011

Tecnología lítica de los homínidos de Dmanisi: materias primas y comportamiento técnico

Los estudios ponen de manifiesto una elaborada estrategia en la adquisición de la materia prima. Ausencia de lascas rectocadas

Dmanisi es el yacimiento arqueológico que registra las ocupaciones de homínidos más antiguas fuera de África, así como la dispersión de los primeros homínidos en Europa y Asia. El sitio ha suministrado además, un elevado número de artefactos correspondientes a diferentes períodos de ocupación. En este análisis sobre la tecnología lítica de Dmanisi , se incluye una revisión de todas las piezas recuperadas en los últimos 15 años de excavaciones.Este conjunto lítico nos ofrece una idea bastante aproximada del comportamiento técnico de los homínidos en Eurasia, entre 1,7-1,8 Ma. Los homínidos de Dmanisi explotaron fundamentalmente las rocas locales, sobre todo las procedentes de lechos fluviales. Cantos rodados y bloques angulosos de basalto, andesita y toba, formaron parte de los principales soportes utilizados. Mucha es la información vertida en este artículo que publicaba esta semana el Journal of Human Evolution: gran parte de los nódulos, cantos y bloques de basalto rodados, no fueron modificados. Los análisis petrográficos, por otro lado, demuestran que hubo traslado de ciertos materiales hasta el propio yacimiento, lo cual indica una cierta complejidad en el proceso de adquisisicón de las materias primas.

La talla está completamente condicionada por la geometría natural de los soportes. La mayoría de artefactos son núcleos para extracción de lascas o núcleos unifaciales (chopper-cores). Los núcleos, lascas y debrises presentes, demuestran además que todo el proceso de reducción se elaboró en el mismo sitio. Numerosos núcleos unifaciales sugieren que no se trataba de una talla “demasiado elaborada”. También se documeta talla centrípeta en algunos núcleos sobre lasca (flake-cores). Sin bifaces.

Predominio absoluto de lascas frente a herramientas. El sitio es comparable a los yacimientos oldowayenses africanos en lo referente a cadena operativa, tipos de plataforma (talones) o ausencia de lascas retocadas.

Traducción Paleorama: Ana Mgeladze, David Lordkipanidze, Marie-Hélène Moncel,

Ancient Teeth Raise New Questions About Origins of Modern Humans

Lower premolars and canine teeth found at the Qesem cave site in Israel are raising new questions about the origins of modern man. If linked directly to Homo sapiens, it could mean that modern man either originated in what is now Israel or may have migrated from Africa far earlier that is presently accepted, says Binghamton University anthropologist Rolf Quam. (Credit: Rolf Quam)

More in ScienceDaily (Feb. 9, 2011) — Eight small teeth found in a cave near Rosh Haain, central Israel, are raising big questions about the earliest existence of humans and where we may have originated, says Binghamton University anthropologist Rolf Quam.

"Silves Islâmica: cinco séculos de ocupação do Arrabalde Oriental"

Exposição "Silves Islâmica: cinco séculos de ocupação do Arrabalde Oriental"
Mostram-se mais de duas centenas de objectos arqueológicos provenientes da intervenção arqueológica que dirigi no âmbito da construção da nova Biblioteca Municipal.
Trata-se de uma exposição que descreve, de forma didáctica e com recurso a plantas do local, as diversas fases de ocupação do arrabalde, desde o século X - altura em que a área se incluía no espaço periurbano da cidade até à reconquista cristã, período em que aquela área inicia um processo de desertificação.

Geoarchaeology


segunda-feira, 7 de fevereiro de 2011

Anthropologists Discover Earliest Cemetery in Middle East

Graves from the Middle Epipalaeolithic cemetery of ‘Uyun al-Hammam. (Credit: Lisa A. Maher, Jay T. Stock, Sarah Finney, James J. N. Heywood, Preston T. Miracle, Edward B. Banning. A Unique Human-Fox Burial from a Pre-Natufian Cemetery in the Levant (Jordan). PLoS ONE, 2011; 6 (1): e15815 DOI: 10.1371/journal.pone.0015815)

Anthropologists at the University of Toronto and the University of Cambridge have discovered the oldest cemetery in the Middle East at a site in northern Jordan. The cemetery includes graves containing human remains buried alongside those of a red fox, suggesting that the animal was possibly kept as a pet by humans long before dogs ever were.

More in ScienceDaily (Feb. 2, 2011)

Secrets in Stone: Rare Archaeological Find in Norway

These unusual petroglyphs were found in a burial mound in Stjørdal, central Norway. (Credit: Anne Haug, NTNU Museum of Natural History and Archaeology)

It looked to be a routine excavation of what was thought to be a burial mound. But beneath the mound, archaeologists from the Norwegian University of Science and Technology's Museum of Natural History and Archaeology found something more: unusual Bronze Age petroglyphs. "We believe these are very special in a Norwegian context," says museum researcher and project manager Anne Haug.

More in ScienceDaily (Jan. 31, 2011)

Modern Humans Reached Arabia Earlier Than Thought, New Artifacts Suggest

Jebel Faya rockshelter from above, looking north, shows eboulis blocks from roof collapse and the location of excavation trenches. (Credit: Copyright Science/AAAS)

Artifacts unearthed in the United Arab Emirates date back 100,000 years and imply that modern humans first left Africa much earlier than researchers had expected, a new study reports. In light of their excavation, an international team of researchers led by Hans-Peter Uerpmann from Eberhard Karls University in Tübingen, Germany suggests that humans could have arrived on the Arabian Peninsula as early as 125,000 years ago -- directly from Africa rather than via the Nile Valley or the Near East, as researchers have suggested in the past.

More in ScienceDaily (Jan. 27, 2011)