jueves, 26 de enero de 2012

Los primeros humanos modernos que salieron de África después migraron a Arabia

El momento y el patrón de migración de los primeros humanos modernos ha sido una fuente frecuente de discusión e investigación. Ahora, un nuevo estudio liderado por la Universidad de Oporto (UP, Portugal) y la Universidad de Leeds (Reino Unido) basa su investigación en el análisis genético para buscar pistas sobre la migración de estos primeros humanos modernos que salieron de África hace más de 60.000 años.

"Una pregunta importante sin respuesta con respecto a la dispersión de los humanos modernos en todo el mundo se refiere al lugar geográfico de sus primeros pasos fuera de África", explica Luisa Pereira, del Instituto de Patología Molecular e Inmunología de la UP (IPATIMUP).

La investigación de Pereira y su equipo, publicada por Cell Press en la revista American Journal of Human Genetics, proporciona una visión sobre las primeras etapas de la migración humana y sugiere que los humanos modernos se establecieron en Arabia en su camino del Cuerno de África para colonizar el resto del mundo.

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Referencia bibliográfica: Fernandes et al., "The Arabian Cradle: Mitochondrial Relicts of the First Steps along the Southern Route out of Africa", The American Journal of Human Genetics 90: 1–9, 2012, doi:10.1016/j.ajhg.2011.12.010.
Fuente: Noticias SINC
Link 2: Following genetic footprints out of Africa

Cueva de la Laja Alta en Jimena de la Frontera, Cádiz - Arqueomanía



Entrada relacionada: 05-01-12. Arqueomanía - Capítulo 8
Vídeos relacionados: La cueva de la Pileta y su entorno.

Grand inventaire au musée du Mas d'Azil

A l’heure où les feux de l’actualité sont braqués sur la grotte du Mas d’Azil et les découvertes mises au jour lors des travaux de revalorisation du site, une équipe du CNRS de Toulouse sous la houlette de Carole Fritz, responsable de l'équipe CREAP du laboratoire TRACES, travaille sur les collections du musée... VIDÉO

lire l'article d'Ariégenew's, lien
Vía Association Lithos

2,3 millones de euros en la mejora del patrimonio histórico de 11 municipios de Jaén

... La diputada de Empleo, Promoción y Turismo, Ángeles Férriz, junto a la alcaldesa de Jimena, Esther Ulloa, ha visitado hoy dos de las iniciativas que en esta materia se están realizando en este municipio, donde se está adecuando el entorno de la “Cueva de la Graja” –en la que se pueden contemplar pinturas rupestres neolíticas...

La intervención en “La Graja” consiste fundamentalmente en la mejora del firme de acceso a esta cueva, así como del camino paralelo a la peña en la que se encuentra la misma. También se señalizará este entorno, que será dotado de mobiliario urbano y de un vallado de madera. “El objetivo es favorecer la visita a esta cueva, de gran valor arqueológico, puesto que los conjuntos rupestres que se pueden contemplar en la misma son uno de los testimonios más antiguos que existen sobre esta localidad”, señala Férriz...

Diario de Linares

Study into Jersey Neanderthal mammoth hunters

Archaeologists are investigating the truth behind the story that Ice Age Neanderthals in Jersey would push mammoths off cliffs in St Brelade for food.

About 30 years ago, evidence suggested early residents of what is today the island of Jersey chased the giant mammals off the cliffs at La Cotte above Ouaisne.

Dr Geoff Smith, an analyst for Jersey Archive, said: "It was in the 70s and 80s that the hypothesis was put forward that Neanderthals were grouping together to drive herds of woolly mammoth and woolly rhinos off the cliffs and butchering them."

He is now using new technology to look at whether that theory is correct or not.

Dr Smith said: "No-one has ever really questioned it so we are going back, re-assessing and re-analysing and see if we can come up with new information to come up with more support or even refute it slightly.

"We don't know, we are never going to completely understand, but we just want to see if we can get more data and understand Neanderthals even better."

In a cave at La Cotte in Ouaisne Bay archaeologists have, over the years, found tools and the fossilised bones and teeth of woolly mammoth, woolly rhinoceros, cave bear and reindeer.

These remains date from a time when the view from Ouaisne was not sea, but a huge treeless land stretching all the way to what is now St Malo...

BBC News

Link 2: Arqueólogos de la isla de Jersey (Inglaterra) investigan si los neandertales cazaban mamuts precipitándolos en los acantilados.

Dawn of social networks: Ancestors may have formed ties with both kin and non-kin based on shared attributes

Dawn of social networks: Ancestors may have formed ties with both kin and non-kin based on shared attributes: Ancient humans may not have had the luxury of updating their Facebook status, but social networks were nevertheless an essential component of their lives, a new study suggests. The study's findings describe elements of social network structures that may have been present early in human history, suggesting how our ancestors may have formed ties with both kin and non-kin based on shared attributes, including the tendency to cooperate. According to the paper, social networks likely contributed to the evolution of cooperation...

Journal Reference:
Coren L. Apicella, Frank W. Marlowe, James H. Fowler, Nicholas A. Christakis. Social networks and cooperation in hunter-gatherers. Nature, 2012; 481 (7382): 497 DOI: 10.1038/nature10736

Link 2: 27-01-12. El amanecer de las redes sociales: nuestros antepasados formaban lazos de unión con base a atributos compartidos

Becoming Human (NOVA)

Vídeos (3) YouTube (EvolutionDocumentary el 23-24/01/2012) añadidos a Paleo Vídeos > Prehistoria Universal > L.R.2.3

Episode 1: First Steps (51:03)
Broadcast (2010) First Steps examines the factors that caused us to split from the other great apes. The program explores the fossil of Selam, also known as Lucy's Child. Paleoanthropologist Zeray Alemseged spent five years carefully excavating the sandstone embedded fossil. NOVA's cameras are there to capture the unveiling of the face, spine, and shoulder blades of this 3.3 million year old fossil child...

Episode 2: Birth Of Humanity (51:03)
Broadcast (2010) The second episode of this series from NOVA investigates the first skeleton that really looks like us "Turkana Boy" an astonishingly complete specimen of Homo erectus found by the famous Leakey team in Kenya. These early humans are thought to have developed key innovations that helped them thrive, including hunting large prey, the use of fire, and extensive social bonds...

Episode 3: Last Human Standing (51:02)
Broadcast (2010) Last Human Standing examines the fate of the Neanderthals, our European cousins who died out as modern humans spread from Africa into Europe during the Ice Age. Did modern humans interbreed with Neanderthals or exterminate them? The program explores crucial evidence from the recent decoding of the Neanderthal genome. How did modern humans take over the world? New evidence suggests that they left Africa and colonized the rest of the globe far earlier, and for different reasons, than previously thought...

Vídeo relacionado: Prehistoria Universal > L.R.2 (2/2): nº 9. NOVA Becoming Human Preview PBS (02/10/2009)