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      <pubDate>2023-10-12 13:49:12 UTC</pubDate>
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         <title>Resumo Geologia</title>
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         <description><![CDATA[<div>O texto começa por explicar que se viagem no tempo fosse possível e voltássemos para o mundo arcaico, pouco tempo expostos causariam nos diversos danos tanto à pele quanto à roupa. Nesse período, a Terra era pobre em oxigênio e rica em vapores nocivos (ácido clorídrico e sulfúrico). A sua atmosfera não permitia a entrada de muita luz solar e era brevemente iluminada por clarões frequentes e intensos. Durante 2 biliões de anos, os únicos seres vivos eram bactérias. No primeiro bilião, as cianobactérias utilizavam o hidrogénio da água, para realizar fotossíntese.&nbsp; Conforme as cianobactérias iam aumentando, a quantidade de 02 aumentava no mundo e, consequentemente, de veneno, já que nenhum organismo usava oxigénio. Os novos organismos que utilizavam oxigénio, produziam mais energia e venciam dos organismos competidores. A acumulação de oxigénio na atmosfera, ao combinar se com o ferro formou óxido de ferro, principal constituinte do minério de ferro. Além disso, sem sinais de possível vida evoluída.<br><br></div><div>&nbsp; As cianobactérias tornaram-se ligeiramente pegajosas e conseguiam segurar micropartículas de poeira e areias, tornando se estromatólitos. Eram uma espécie de rocha viva, e cooperavam com alguns organismos primitivos, tornando se o primeiro ecossistema do mundo.&nbsp;<br><br></div><div>&nbsp; A evolução demorou muito tempo por não existir oxigénio suficiente na atmosfera. Animais não conseguiam ter energia suficiente pra funcionarem. Um processo que demorou 2 biliões de anos para alcançar níveis próximos aos atuais. Após isso, de repente aparece um novo tipo de célula, com núcleo e outras pequenas estruturas, organelos. Esta célula seria consequência de junção de 2 bactérias. A bactéria cativa transformou-se mitocôndria, e por sua vez, a invasão mitocondrial (processo endossimbiótico) tornou possível a vida complexa.<br><br></div><div>&nbsp; As mitocôndrias utilizam o O2 de forma a libertar energia a partir das substâncias alimentares (Quase tudo que é ingerido vai para as mitocôndrias). Sem este processo, a vida seria cheia de simples micróbios. As mitocôndrias têm o seu próprio ADN, ARN e ribossomas. Reproduzem-se se num tempo diferente do da sua célula hospedeira. Parecidas a bactérias, dividem-se e, por vezes, têm reações iguais a antibióticos. Mesmo assim, sem as mitocôndrias, a humanidade não existiria.<br>&nbsp; O novo tipo de célula é chamado de eucariota, verdadeiramente nucleada. O antigo tipo de célula denominada de procariótica, pré-nucleada. Comparando as células procariotas e eucariotas, as eucariotas são maiores e com maior quantidade de DNA. Essa diferença leva haver dois tipos de organismos: aqueles que libertam oxigénio e aqueles que o respiram. Os eucariotas unicelulares já foram chamados de alguns nomes, mas o termo correto é <strong><em>protistas.</em></strong> Comparando com as bactérias, são uma evolução grandiosa, tendo imensa informação genética no seu DNA. Após cerca de um bilião de anos, os eucariotas começaram a agrupar-se e transformar-se em seres multicelulares complexos. Este processo permitiu que surgissem seres maiores e mais complexos, como humanos.<br><br><br></div><div><br><br></div>]]></description>
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         <title>Apatossaurus Alenquerensis </title>
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         <pubDate>2023-11-27 19:27:37 UTC</pubDate>
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         <pubDate>2024-01-17 14:01:21 UTC</pubDate>
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         <title>Notícia 1</title>
         <author>isaa155</author>
         <link>https://padlet.com/isaa155/qh89crt33d7x1ftq/wish/3014380609</link>
         <description><![CDATA[<p>A atividade vulcânica de Vênus é maior do que se imaginava, de acordo com um novo estudo publicado na Nature. Os cientistas encontraram evidências de erupções no planeta em dados da missão Magalhães, que investigou a superfície venusiana na década de 1990.</p><p><br/></p>]]></description>
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         <pubDate>2024-05-31 12:34:38 UTC</pubDate>
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         <title>Notícia 2</title>
         <author>isaa155</author>
         <link>https://padlet.com/isaa155/qh89crt33d7x1ftq/wish/3014382636</link>
         <description><![CDATA[<p>A “Porta do Inferno” fica localizada na República de Sakha, no nordeste da Sibéria, Rússia, é uma formação geológica originada pelo derretimento do permafrost. Também conhecida como Batagaika Crater, esse imenso buraco no solo é resultado desse processo.</p><p>Uma pesquisa publicada em março de 2024, realizada por cientistas da Universidade Estatal de Lomosonov em colaboração com o Instituto Alfred Wegener da Alemanha, revelou a velocidade com que a cratera está se expandindo: até um milhão de metros cúbicos por ano, devido ao derretimento do permafrost. Além disso, ela libera toneladas de carbono na atmosfera anualmente.</p><p>Segundo o estudo, em 2023, a cratera tinha 990 metros de largura, um aumento de 200 metros em menos de 10 anos em comparação com seu tamanho em 2014, que era de 790 metros. A formação da cratera teve início na década de 1960, quando a desflorestação e outras atividades humanas removeram a camada de vegetação que isolava o permafrost. Esse processo acelerou o descongelamento do permafrost, levando ao colapso do solo e à formação do buraco.</p><p>Apesar disso, a cratera só foi descoberta em 1991, por meio de imagens de satélite, após o deslizamento de uma encosta nas terras altas de Yana, ao norte de Yakutia, próximo à região da cratera. Esse evento expôs o permafrost, que estava congelado há 650 mil anos, tornando-o o permafrost mais antigo da Sibéria e o segundo mais antigo do mundo.</p><p>O Serviço Geológico dos Estados Unidos (USGS) explica que crateras como essa surgem quando a rocha subterrânea, composta de calcário, carbonato e outros sais solúveis, se dissolve em água. Conhecida tecnicamente como depressão termocárstica, a cratera é um indicador do impacto das mudanças climáticas, já que o aumento das temperaturas derrete o permafrost que sustenta a estabilidade do solo, resultando na expansão do buraco.</p>]]></description>
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         <pubDate>2024-05-31 12:37:35 UTC</pubDate>
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         <title></title>
         <author>isaa155</author>
         <link>https://padlet.com/isaa155/qh89crt33d7x1ftq/wish/3014400127</link>
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         <pubDate>2024-05-31 13:01:29 UTC</pubDate>
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