Cena de assassinato pode revelar porque os Neandertais foram extintos
Autor: Cortina Preta | Publicado: 2010-12-21T12:58:00-02:00


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 49.000 anos atrás, em uma caverna na Espanha, doze Neandertais foram mortos e devorados por um outro grupo de Neandertais. Essa cena chocante pode nos dizer muito sobre as razões pela qual nossos primos humanóides se extinguiram tão rápido. &nbsp;
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 <![endif]--><!--[if gte mso 9]>   <![endif]--><!--[if gte mso 9]>       <![endif]-->  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Existem várias teorias do porque os Neandertais foram extintos. Uma delas diz que eles eram menos geneticamente diversificados que nossos ancestrais, tornando-os menos aptos a sobreviverem a vírus letais, enquanto outra diz que eles viviam em grupos menores e menos organizados que os humanos, o que os deixava mais vulneráveis a ataques de predadores ou a desastres naturais. Agora, o chamado “Túnel dos Ossos”, em uma caverna em El Sidrón, Espanha, pode nos ajudar a testar essas teorias.&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Os dados coletados dos restos mortais revelaram que os Neandertais na caverna eram muito similares geneticamente. Os três machos adultos, dois machos adolescentes e uma criança compartilhavam o mesmo DNA Mitocondrial, o que sugere que eles tiveram uma fêmea ancestral em comum muito recentemente, talvez uma avó. As três fêmeas adultas tinham DNA Mitocondrial diferente, e um adolescente, uma criança e um bebê compartilhavam outro tipo comum de DNA Mitocondrial.  Fonte: http://io9.com/