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      The acheulean handaxe: More like a bird's song than a beatles' tune?

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          Abstract

          The goal of this paper is to provoke debate about the nature of an iconic artifact—the Acheulean handaxe. Specifically, we want to initiate a conversation about whether or not they are cultural objects. The vast majority of archeologists assume that the behaviors involved in the production of handaxes were acquired by social learning and that handaxes are therefore cultural. We will argue that this assumption is not warranted on the basis of the available evidence and that an alternative hypothesis should be given serious consideration. This alternative hypothesis is that the form of Acheulean handaxes was at least partly under genetic control.

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          Inferring human population size and separation history from multiple genome sequences

          The availability of complete human genome sequences from populations across the world has given rise to new population genetic inference methods that explicitly model their ancestral relationship under recombination and mutation. So far, application of these methods to evolutionary history more recent than 20-30 thousand years ago and to population separations has been limited. Here we present a new method that overcomes these shortcomings. The Multiple Sequentially Markovian Coalescent (MSMC) analyses the observed pattern of mutations in multiple individuals, focusing on the first coalescence between any two individuals. Results from applying MSMC to genome sequences from nine populations across the world suggest that the genetic separation of non-African ancestors from African Yoruban ancestors started long before 50,000 years ago, and give information about human population history as recently as 2,000 years ago, including the bottleneck in the peopling of the Americas, and separations within Africa, East Asia and Europe.
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            Demography and Cultural Evolution: How Adaptive Cultural Processes can Produce Maladaptive Losses: The Tasmanian Case

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              Late Pleistocene demography and the appearance of modern human behavior.

              The origins of modern human behavior are marked by increased symbolic and technological complexity in the archaeological record. In western Eurasia this transition, the Upper Paleolithic, occurred about 45,000 years ago, but many of its features appear transiently in southern Africa about 45,000 years earlier. We show that demography is a major determinant in the maintenance of cultural complexity and that variation in regional subpopulation density and/or migratory activity results in spatial structuring of cultural skill accumulation. Genetic estimates of regional population size over time show that densities in early Upper Paleolithic Europe were similar to those in sub-Saharan Africa when modern behavior first appeared. Demographic factors can thus explain geographic variation in the timing of the first appearance of modern behavior without invoking increased cognitive capacity.
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                Author and article information

                Journal
                Evol Anthropol
                Evol. Anthropol
                10.1002/(ISSN)1520-6505
                EVAN
                Evolutionary Anthropology
                John Wiley and Sons Inc. (Hoboken )
                1060-1538
                1520-6505
                Jan-Feb 2016
                22 January 2016
                : 25
                : 1 ( doiID: 10.1002/evan.v25.1 )
                : 6-19
                Article
                EVAN21467
                10.1002/evan.21467
                5066817
                26800014
                4db72524-3a60-4085-8ed8-055310331fbb
                © 2016 The Authors Evolutionary Anthropology: Issues, News, and Reviews Published by Wiley Periodicals, Inc.

                This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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                Pages: 14
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                2.0
                evan21467
                January/February 2016
                Converter:WILEY_ML3GV2_TO_NLMPMC version:4.9.5 mode:remove_FC converted:17.10.2016

                acheulean handaxe,cultural transmission,social learning,genetic transmission

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