{"id":64722,"date":"2017-04-29T12:03:02","date_gmt":"2017-04-29T15:03:02","guid":{"rendered":"https:\/\/espacoecologico.com.br\/arquivo\/?p=64722"},"modified":"2017-04-29T12:03:03","modified_gmt":"2017-04-29T15:03:03","slug":"ossos-tecnica-isola-dna-humano-pre-historico-do-chao-de-cavernas","status":"publish","type":"post","link":"https:\/\/espacoecologico.com.br\/arquivo\/ossos-tecnica-isola-dna-humano-pre-historico-do-chao-de-cavernas\/","title":{"rendered":"Ossos? T\u00e9cnica isola DNA humano pr\u00e9-hist\u00f3rico do ch\u00e3o de cavernas"},"content":{"rendered":"<p><script src=\"http:\/\/b.scorecardresearch.com\/c2\/6906435\/cs.js\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"\/\/a.teads.tv\/page\/64103\/tag\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"http:\/\/pagead2.googlesyndication.com\/pagead\/osd.js\"><\/script><script 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src=\"\/\/experience.tinypass.com\/xbuilder\/experience\/load?aid=3vxSO5Sezi\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/connect.facebook.net\/signals\/config\/1783600831964741?v=stable\" async=\"\"><\/script><script src=\"https:\/\/connect.facebook.net\/signals\/config\/1869534393278100?v=stable\" async=\"\"><\/script><script src=\"https:\/\/connect.facebook.net\/en_US\/fbevents.js\" async=\"\"><\/script><script src=\"\/\/www.google-analytics.com\/analytics.js\" async=\"\"><\/script><script src=\"http:\/\/www.google-analytics.com\/analytics.js\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"http:\/\/www.google-analytics.com\/ga.js\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"\/\/www.googletagmanager.com\/gtm.js?id=GTM-MMNHP8\" async=\"\"><\/script><script src=\"\/\/ads.rubiconproject.com\/header\/11134.js\"><\/script><\/p>\n<div class=\"container main-container \">\n<div class=\"row\">\n<div class=\"col-md-8\">\n<article id=\"post-178030\" class=\"article\">\n<section class=\"article-content\">\n<a href=\"https:\/\/espacoecologico.com.br\/arquivo\/ossos-tecnica-isola-dna-humano-pre-historico-do-chao-de-cavernas\/dna_pre_historico\/\" rel=\"attachment wp-att-64723\"><img loading=\"lazy\" class=\"alignleft size-medium wp-image-64723\" src=\"https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico-300x192.jpg\" alt=\"\" width=\"300\" height=\"192\" srcset=\"https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico-300x192.jpg 300w, https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico.jpg 415w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>Ningu\u00e9m te d\u00e1 uma colher de ch\u00e1? \u00c9 que n\u00e3o vale a pena. D\u00ea uma \u00e0 arque\u00f3loga alem\u00e3 Viviane Slon, para ver o que acontece. Ela vai com o talher a uma caverna in\u00f3spita, tira do ch\u00e3o um tanto de terra igual ao que voc\u00ea p\u00f5e de a\u00e7\u00facar no leite, leva para o laborat\u00f3rio e isola amostras de DNA de um homin\u00eddeo pr\u00e9-hist\u00f3rico.<\/p>\n<p><script src=\"http:\/\/b.scorecardresearch.com\/c2\/6906435\/cs.js\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"\/\/a.teads.tv\/page\/64103\/tag\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"http:\/\/pagead2.googlesyndication.com\/pagead\/osd.js\"><\/script><script 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<![CDATA[\n{\"@context\":\"http:\/\/schema.org\",\"@type\":\"NewsArticle\",\"mainEntityOfPage\":{\"@type\":\"WebPage\",\"@id\":\"http:\/\/super.abril.com.br\/blog\/supernovas\/ossos-tecnica-isola-dna-humano-pre-historico-do-chao-de-cavernas\/\"},\"headline\":\"Ossos? T\u00e9cnica isola DNA humano pr\u00e9-hist\u00f3rico do ch\u00e3o de cavernas\",\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\/\/abrilsuperinteressante.files.wordpress.com\/2017\/04\/slon1hr.jpg?quality=70&#038;strip=info&#038;w=800\",\"height\":1199,\"width\":800},\"datePublished\":\"2017-04-28T14:52:04-0300\",\"dateModified\":\"2017-04-28T14:52:04-0300\",\"author\":[{\"@type\":\"Person\",\"name\":\"Bruno Vaiano\"}],\"publisher\":{\"@type\":\"Organization\",\"name\":\"Superinteressante\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\/\/abrilsuperinteressante.files.wordpress.com\/2017\/01\/screen-shot-2017-01-13-at-7-13-38-pm.png?w=150\",\"width\":150,\"height\":58}},\"description\":\"O m\u00e9todo permite tra\u00e7ar com precis\u00e3o in\u00e9dita o caminho que nossa esp\u00e9cie percorreu para tomar o planeta\"}\n\/\/ ]]><\/script><script src=\"https:\/\/s0.wp.com\/_static\/??-eJyFjt0KwjAMhV\/IrkxlzAvxWboaZ2r\/bNINfXo72S7EoRBIOPk458gxCvTa5jOQNGXuGdJjXpWhjfwFCId9UgyVQ7\/AOngGzxPrQocWRCZIqi9aMbqEFS4GYgdEBVr5flZCPyCMfzEDHJW+iQSEzy9XvkLJkwNGqbqEVjhFDElGm3v0NIsLHVH58O45HcXr5I71\/rDb1m3bNOYFVmN4ng==\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/cdn.tinypass.com\/api\/tinypass-gtp.min.js?ver=4.7.4\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/underscore.js\/1.5.2\/underscore-min.js\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/cdn.boomtrain.com\/analyticstrain\/abril-superinteressante\/analyticstrain.min.js\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/d3r7h55ola878c.cloudfront.net\/btn\/1.0.7\/nudgespot-loader.js\" type=\"text\/javascript\"><\/script><script src=\"\/\/www.npttech.com\/advertising.js\" async=\"true\"><\/script><script src=\"http:\/\/rtax.criteo.com\/delivery\/rta\/rta.js?netId=4317&amp;cookieName=crtg_rta&amp;rnd=23849995315&amp;varName=crtg_content\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/x-abril.inventorycdn.com\/js?cookie=rh_abril\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/securepubads.g.doubleclick.net\/gpt\/pubads_impl_115.js\" async=\"\"><\/script><\/p>\n<div class=\"container main-container \">\n<div class=\"row\">\n<div class=\"col-md-8\">\n<article id=\"post-178030\" class=\"article\">\n<section class=\"article-content\">\nIsso \u00e9 que \u00e9 se contentar com pouco. \u00c9 assim, de colherada em colherada, que ela vai mudar a hist\u00f3ria da ci\u00eancia \u2014 e tra\u00e7ar com uma precis\u00e3o in\u00e9dita os caminhos que o <i>Hopo sapiens<\/i> e seus primos homin\u00eddeos percorreram at\u00e9 ocupar todo o planeta.<\/p>\n<p>A ocupa\u00e7\u00e3o da Terra por primatas espertinhos \u00e9 um dos quebra-cabe\u00e7as mais desafiadores da ci\u00eancia. H\u00e1 vers\u00f5es oficiais, que s\u00e3o quase consenso entre quem entende do assunto. Uma \u00e9 a de que a ocupa\u00e7\u00e3o da Am\u00e9rica come\u00e7ou h\u00e1 meros 20 mil anos \u2014 quando o mar secou entre o Alasca e o cantinho mais solit\u00e1rio da R\u00fassia, e um bando particularmente corajoso de <i>Homo sapiens<\/i> tentou a sorte e chegou ao Novo Mundo.<\/p>\n<p>De tempos em tempos, por\u00e9m, surge por aqui uma pedra ou ossada mais antiga do que isso, e a\u00ed, com o perd\u00e3o da rima, a ci\u00eancia vira um rebuli\u00e7o. Foi <a href=\"http:\/\/super.abril.com.br\/ciencia\/humanos-podem-ter-chegado-a-america-muito-antes-do-que-se-pensava\/\" target=\"_blank\" rel=\"noopener noreferrer\">o que aconteceu ontem<\/a>, quando um esqueleto de mastodonte de 130 mil anos achado na Calif\u00f3rnia em 1992 foi tirado dos arquivos para uma nova an\u00e1lise \u2014 e revelou arranh\u00f5es e marcas que poderiam muito bem ser obra de um ser humano.<\/p>\n<p>Hoje, \u00e9 imposs\u00edvel bater o martelo a favor de uma ou outra vers\u00e3o. Esp\u00e9cies do g\u00eanero <i>Homo <\/i>tem o p\u00e9ssimo h\u00e1bito de n\u00e3o deixar muitos ossos por a\u00ed depois da morte. E o melhor jeito de saber se um macac\u00e3o esperto esteve em tal lugar em tal per\u00edodo \u00e9 encontrar o cad\u00e1ver dele \u2014 ossos de mam\u00edferos ro\u00eddos ou pedras com jeit\u00e3o de ferramenta s\u00e3o boas pistas da presen\u00e7a humana, mas n\u00e3o provas irrefut\u00e1veis.<\/p>\n<p><script src=\"http:\/\/b.scorecardresearch.com\/c2\/6906435\/cs.js\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"\/\/a.teads.tv\/page\/64103\/tag\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"http:\/\/pagead2.googlesyndication.com\/pagead\/osd.js\"><\/script><script 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src=\"\/\/experience.tinypass.com\/xbuilder\/experience\/load?aid=3vxSO5Sezi\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/connect.facebook.net\/signals\/config\/1783600831964741?v=stable\" async=\"\"><\/script><script src=\"https:\/\/connect.facebook.net\/signals\/config\/1869534393278100?v=stable\" async=\"\"><\/script><script src=\"https:\/\/connect.facebook.net\/en_US\/fbevents.js\" async=\"\"><\/script><script src=\"\/\/www.google-analytics.com\/analytics.js\" async=\"\"><\/script><script src=\"http:\/\/www.google-analytics.com\/analytics.js\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"http:\/\/www.google-analytics.com\/ga.js\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"\/\/www.googletagmanager.com\/gtm.js?id=GTM-MMNHP8\" async=\"\"><\/script><script src=\"\/\/ads.rubiconproject.com\/header\/11134.js\"><\/script><script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/underscore.js\/1.5.2\/underscore-min.js\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/cdn.boomtrain.com\/analyticstrain\/abril-superinteressante\/analyticstrain.min.js\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/d3r7h55ola878c.cloudfront.net\/btn\/1.0.7\/nudgespot-loader.js\" type=\"text\/javascript\"><\/script><script src=\"\/\/www.npttech.com\/advertising.js\" async=\"true\"><\/script><script src=\"http:\/\/rtax.criteo.com\/delivery\/rta\/rta.js?netId=4317&amp;cookieName=crtg_rta&amp;rnd=23849995315&amp;varName=crtg_content\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/x-abril.inventorycdn.com\/js?cookie=rh_abril\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/securepubads.g.doubleclick.net\/gpt\/pubads_impl_115.js\" async=\"\"><\/script><\/p>\n<div class=\"container main-container \">\n<div class=\"row\">\n<div class=\"col-md-8\">\n<article id=\"post-178030\" class=\"article\">\n<section class=\"article-content\">E \u00e9 a\u00ed que entra o trunfo de Slon e da equipe do Instituto Max Planck. Eles deram um jeito de tirar amostras de DNA de centenas de milhares de anos de um montinho de p\u00f3. O que \u00e9 ainda melhor do que encontrar ossos. Afinal, essas mol\u00e9culas n\u00e3o s\u00f3 provam que algu\u00e9m passou por ali como tamb\u00e9m d\u00e3o a ficha completa do antepassado em quest\u00e3o \u2014 uma informa\u00e7\u00e3o bastante valiosa em uma \u00e9poca em que n\u00f3s dividimos espa\u00e7o com Neandertais e os ainda misteriosos homin\u00eddeos de Denisova, que viveram no sul da Sib\u00e9ria h\u00e1 no m\u00ednimo 380 mil anos.<\/p>\n<p>A hist\u00f3ria das rela\u00e7\u00f5es entre nossa esp\u00e9cie e essas ramifica\u00e7\u00f5es ainda \u00e9 cheia de lacunas, e s\u00f3 uma quantidade razo\u00e1vel de an\u00e1lises gen\u00e9ticas \u2014 antes imposs\u00edveis pela aus\u00eancia de ossos, mas agora bem plaus\u00edveis \u2014 pode resolver a quest\u00e3o. A equipe da alem\u00e3 j\u00e1 coletou oito amostras em quatro cavernas da Eur\u00e1sia, e com o material gen\u00e9tico dos nossos dois primos extintos, veio de brinde recheio de c\u00e9lula de v\u00e1rios outros mam\u00edferos da \u00e9poca.<\/p>\n<p>O resultado? Um di\u00e1rio biol\u00f3gico boa parte do que aconteceu nesses buracos entre 550 mil e 14 mil atr\u00e1s. Para um CDF, essa \u00e9 a pr\u00f3pria defini\u00e7\u00e3o de um parque de divers\u00f5es \u2014 e uma chance de reescrever nossa hist\u00f3ria.<\/p>\n<p>Por isso, a rea\u00e7\u00e3o ao novo m\u00e9todo foi\u2026 enf\u00e1tica. Parece um pouco com as cr\u00edticas de jornal que as editoras p\u00f5e atr\u00e1s dos livros para atrair a aten\u00e7\u00e3o do p\u00fablico. \u201c\u00c9 como descobrir que voc\u00ea pode extrair ouro em p\u00f3 do ar\u201d, afirmou o geneticista norte-americano Adam Siepel <a href=\"https:\/\/www.nytimes.com\/2017\/04\/27\/science\/ancient-human-dna-cave-dirt.html?rref=collection%2Fsectioncollection%2Fscience&amp;action=click&amp;contentCollection=science&amp;region=rank&amp;module=package&amp;version=highlights&amp;contentPlacement=1&amp;pgtype=sectionfront&amp;_r=0\" target=\"_blank\" rel=\"noopener noreferrer\">ao <i>The New York Times.<\/i><\/a> \u201cUm artigo cient\u00edfico incr\u00edvel e absolutamente excitante\u201d, soltou David Reich, da Universidade de Harvard.<\/p>\n<p>N\u00e3o vejo tanto amor assim desde Elena Ferrante.<\/p>\n<p>Dito isso, qual \u00e9 o truque m\u00e1gico da alem\u00e3 e sua equipe? Senta a\u00ed, pois o primeiro ingrediente \u00e9 paci\u00eancia (quem estiver com o jarg\u00e3o cient\u00edfico em dia pode ler <a href=\"http:\/\/science.sciencemag.org\/content\/early\/2017\/04\/26\/science.aam9695\" target=\"_blank\" rel=\"noopener noreferrer\">o artigo original<\/a> na <i>Science<\/i>, \u00e9 claro).<\/p>\n<p>Vieram entre 5 mil e 2.8 milh\u00f5es de amostras em cada montinho de terra, e s\u00f3 algo entre 0 e 8,82 mil delas pertenciam a seres humanos. Na m\u00e9dia, s\u00f3 algo entre 0,05% e 10% de cada amostra tinha DNA de algum mam\u00edfero \u2014 todo o resto vinha de bact\u00e9rias e outros organismos monocelulares. Essas varia\u00e7\u00f5es s\u00e3o mera quest\u00e3o de sorte. Dependem de qual ponto do ch\u00e3o ou das paredes do local foi escolhido para a escava\u00e7\u00e3o, e tamb\u00e9m da profundidade \u2014 quanto mais fundo, mais antigo.<\/p>\n<p>O \u00fanico jeito de garantir a precis\u00e3o foi usar uma esp\u00e9cie de vara de pescar microsc\u00f3pica, com uma isca molecular personalizada que atrai sequ\u00eancias de DNA exclusivas do reino animal. Um trabalho sem fim, que contou com a ajuda de rob\u00f4s e computadores potentes, e s\u00f3 foi poss\u00edvel com tecnologia que n\u00e3o estava dispon\u00edvel h\u00e1 dez ou vinte anos atr\u00e1s.<\/p>\n<p>Ainda bem que vale o esfor\u00e7o. Agora estamos na trilha certa para resolver os dilemas da evolu\u00e7\u00e3o humana do \u00fanico jeito que d\u00e1 certo: menos especula\u00e7\u00e3o e mais n\u00fameros.<\/p>\n<p>\u201cSe esse m\u00e9todo funcionar, ele vai dar um panorama muito rico da distribui\u00e7\u00e3o geogr\u00e1fica e os padr\u00f5es de migra\u00e7\u00e3o de humanos antigos\u201d, <a href=\"https:\/\/www.nytimes.com\/2017\/04\/27\/science\/ancient-human-dna-cave-dirt.html?rref=collection%2Fsectioncollection%2Fscience&amp;action=click&amp;contentCollection=science&amp;region=rank&amp;module=package&amp;version=highlights&amp;contentPlacement=1&amp;pgtype=sectionfront&amp;_r=0\" target=\"_blank\" rel=\"noopener noreferrer\">afirmou Reich<\/a>. \u201cUm que n\u00e3o se limite ao pequeno n\u00famero de ossos que foram encontrados. E isso seria m\u00e1gico.\u201d<\/p>\n<\/section>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Ningu\u00e9m te d\u00e1 uma colher de ch\u00e1? \u00c9 que n\u00e3o vale a pena. D\u00ea uma<\/p>\n","protected":false},"author":7,"featured_media":64723,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"uagb_featured_image_src":{"full":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico.jpg",415,265,false],"thumbnail":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico-150x150.jpg",150,150,true],"medium":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico-300x192.jpg",300,192,true],"medium_large":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico.jpg",415,265,false],"large":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico.jpg",415,265,false],"1536x1536":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico.jpg",415,265,false],"2048x2048":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico.jpg",415,265,false],"cream-magazine-thumbnail-2":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico.jpg",415,265,false],"cream-magazine-thumbnail-3":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico.jpg",415,265,false],"cream-magazine-thumbnail-4":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/dna_pre_historico.jpg",415,265,false]},"uagb_author_info":{"display_name":"","author_link":"https:\/\/espacoecologico.com.br\/arquivo\/author\/"},"uagb_comment_info":0,"uagb_excerpt":"Ningu\u00e9m te d\u00e1 uma colher de ch\u00e1? \u00c9 que n\u00e3o vale a pena. D\u00ea uma","_links":{"self":[{"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/posts\/64722"}],"collection":[{"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/comments?post=64722"}],"version-history":[{"count":0,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/posts\/64722\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/media\/64723"}],"wp:attachment":[{"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/media?parent=64722"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/categories?post=64722"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/tags?post=64722"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}