Museo de la Evolución Humana Publicado 13 diciembre, 2013 Por Pedro Pozas Personas no Humanas El 25 de junio de 2008, tras dos años de intenso debate en los medios de comunicación desde que presenté el Proyecto Gran Simio (PGS) en el Congreso de los Diputados, se aprobó después de una larga exposición de motivos, … [...] Publicado 7 diciembre, 2013 Por Juan Luis Arsuaga Ferreras Diversos aspectos sobre el #ADNAtapuerca del Fémur XIII de la Sima de los Huesos Con motivo de la noticia publicada en Nature sobre el ADN encontrado en la Sima de los Huesos de Atapuerca, varios medios de comunicación me solicitaron mi opinión por escrito. Recojo en este post las columnas publicadas en El País, … [...] Publicado 23 octubre, 2013 Por Emiliano Bruner Los nombres escritos en las rocas Parece que cada nuevo hallazgo en paleoantropología “revolucione” los conocimientos en este sector de la antropología evolutiva. Publicado 22 octubre, 2013 Por María Martinón DMANISI NOS TRAE DE CRÁNEO
Obsidian Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. Obsidian is commonly found within the margins of rhyolitic lava flows known as obsidian flows, where the chemical composition (high silica content) induces a high viscosity and polymerization degree of the lava. The inhibition of atomic diffusion through this highly viscous and polymerized lava explains the lack of crystal growth. Obsidian is hard and brittle; it therefore fractures with very sharp edges, which had been used in the past in cutting and piercing tools, and has been used experimentally as surgical scalpel blades.[4] Origin and properties[edit] Obsidian talus at Obsidian Dome, California ... among the various forms of glass we may reckon Obsian glass, a substance very similar to the stone found by Obsius in Ethiopia.[5] Occurrence[edit] Ancient sources in the Aegean were Melos and Giali.[17]
El blog de Miguelón y Lucy | Un Homo heidelbergensis y una Australophitecus afarensis, de la mano en Internet DISPERSE - Archaeology, The University of York Overview DISPERSE is an Advanced Grant awarded by the European Research Council (ERC) for a 5-year programme of research (2011-2016) involving collaboration between Geoff Bailey at the University of York and Geoffrey King at the Institut de Physique du Globe, Paris. The project will develop systematic methods for reconstructing landscapes associated with active tectonics and sea level change and assess their impact on patterns of human evolution and dispersal. Our overall working hypothesis is that conditions of geological instability, despite the potentially destructive risks associated with them, have played a powerful and dynamic role in the development of human society, exercising selection pressures in favour of the early human evolutionary trajectory, and creating potentially attractive conditions for human settlement and dispersal. Project Aims Project Objectives Project Staff University of York Institut de Physique du Globe External Collaborators
Early Hominin Evolution: Analysis of Early Hominids Bipedal locomotion may have been an adaptation to living in a mixed woodland and grassland environment. It has been suggested that bipedalism was selected for because it made it easier to see long distances when moving over areas covered with tall grasses. This would have been a useful advantage in scavenging for food and watching for big cats and other predators in open environments. An upright posture also potentially helps to dissipate excess body heat and reduces the absorption of heat from the sun because less skin has a direct exposure to ultra violet radiation during the hottest times of the day. There is evidence suggesting that bipedal animals usually can walk greater distances because less energy is expended with their longer strides. The fossil record of early hominins is being added to by new important discoveries almost every year. We have not yet been able to extract DNA from the bones of any australopithecine for comparison with modern human DNA.
Environmental determinism Environmental determinism, also known as climatic determinism or geographical determinism, is the view that the physical environment sets limits on human social development. A nineteenth- and early twentieth-century approach to the study of geography which argued that the general laws sought by human geographers could be found in the physical sciences. Geography therefore became focused on the study of how the physical environment affected, or even caused, human culture and activities. Historiography[edit] Origins[edit] Environmental determinism's origins go back to antiquity, where it is first encountered in a fifth-century medical treatise ascribed to Hippocrates: Airs, Waters, Places.[1] In Roman times it is, for example, found in the work of the Greek geographer Strabo who wrote that climate influences the psychological disposition of different 'races.' Decline[edit] Subsets[edit] Climatic[edit] Economic Development[edit] Climate[edit] Location and Land Composition[edit] Latitude[edit]
Prominent Hominid Fossils This list includes fossils that are important for either their scientific or historic interest, or because they are often mentioned by creationists. One sometimes reads that all hominid fossils could fit in a coffin, or on a table, or a billiard table. That is a misleading image, as there are now thousands of hominid fossils. They are however mostly fragmentary, often consisting of single bones or isolated teeth. The list is sorted by species, going from older to more recent species. Each entry will consist of a specimen number if known (or the site name, if many fossils were found in one place), any nicknames in quotes, and a species name. The following terminology is used. TM 266-01-060-1, "Toumai", Sahelanthropus tchadensis Discovered by Ahounta Djimdoumalbaye in 2001 in Chad, in the southern Sahara desert. "ARA-VP, Sites 1, 6 & 7", Ardipithecus ramidus Discovered by a team led by Tim White, Berhane Asfaw and Gen Suwa (1994) in 1992 and 1993 at Aramis in Ethiopia.
Learning Center :: Genebase Tutorials This tutorial is Part 1 of a 3 part series.Part 1, What is mtDNA? <<== You are herePart 2, What are Ancestral Markers?Part 3, How does it work?This tutorial provides an in depth lesson about the mtDNA and how it allows us to trace our maternal ancestry. The lessons start off with the easy stuff like “what is mtDNA” and then advances to in depth case studies involving mtDNA. You don’t need to understand how mtDNA testing works in order to understand your results, but the more you know about “how”, “why” and “what’s next” when it comes to mtDNA testing, the more you will get out of your experience at Genebase. mtDNA 101 mtDNA stands for “mitochondrial” DNA. mtDNA is unique because while most of the DNA in our body is found in the nucleus of our cells, the mtDNA is found in small structures or organelles called “mitochondria”. Mitochondria is important for producing energy “ATP” for our cells. Where do we get our mtDNA? Maternal inheritance pattern of mtDNA: Facts about mtDNA 1. 2.
Human Fossils From skeletons to teeth, early human fossils have been found of more than 6,000 individuals. With the rapid pace of new discoveries every year, this impressive sample means that even though some early human species are only represented by one or a few fossils, others are represented by thousands of fossils. From them, we can understand things like: how well adapted an early human species was for walking uprighthow well adapted an early human species was for living in hot, tropical habitats or cold, temperate environmentsthe difference between male and female body size, which correlates to aspects of social behaviorhow quickly or slowly children of early human species grew up. While people used to think that there was a single line of human species, with one evolving after the other in an inevitable march towards modern humans, we now know this is not the case. There were periods in the past when three or four early human species lived at the same time, even in the same place.