{"id":77956,"date":"2021-08-16T03:00:57","date_gmt":"2021-08-16T01:00:57","guid":{"rendered":"https:\/\/www.cde.ual.es\/?p=77956"},"modified":"2021-09-03T14:13:52","modified_gmt":"2021-09-03T12:13:52","slug":"have-we-found-the-first-sign-of-animal-life-on-earth","status":"publish","type":"post","link":"https:\/\/www.cde.ual.es\/en\/have-we-found-the-first-sign-of-animal-life-on-earth\/","title":{"rendered":"Have we found the first sign of animal life on Earth?"},"content":{"rendered":"

Canadian geologist claims to have discovered the oldest animal fossils.<\/strong><\/p>\n

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The earliest life forms we know of evolved around 3.7 billion years ago. The world\u2019s oldest known animal, Dickinsonia, dates to about 540 million years ago. A discovery in a remote region of north-west Canada is about to change what we understood until now.<\/p>\n

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According to a study published in the journal \u2018Nature\u2019<\/a>, fossils of ancient sponges found in rock samples may be the earliest sign of animal life. They look like the skeletons of modern sea sponges, and date back 890 million years. That\u2019s about 350 million years older than Dickinsonia \u2013 the oldest undisputed fossils of any animal. The fossils were unearthed in a rugged mountainous terrain that was a prehistoric marine environment. Apparently, these simple creatures were thriving in underwater reefs many millions of years earlier than previously thought.<\/p>\n<\/div>\n<\/div>\n

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Move over Dickinsonia<\/h3>\n

The history of animals \u2013 and by extension ours \u2013 is now back in the spotlight. \u201cWe are animals,\u201d geologist Prof. Elizabeth Turner of Laurentian University in Canada who conducted the research told \u2018USA Today\u2019<\/a>. \u201cAnd we have a big brain, and we\u2019re capable of wondering about stuff, and we wonder how we came to be. What happened before, and what was it like? How did it begin? This is really digging into that. I\u2019m shaking up the apple cart.\u201d<\/p>\n

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\u201cThe earliest animals to emerge evolutionarily were probably sponge-like. This is not surprising given that sponges are the most basic type of animal both today and in the fossil record,\u201d Prof. Turner explained in a \u2018Reuters\u2019 article<\/a>. \u201cThe existence of a protracted back-history is not surprising, but the sheer duration of it \u2013 a few hundred million years \u2013 may be a little unexpected for some researchers.\u201d \u201cI believe these are ancient sponges \u2014 only this type of organism has this type of network of organic filaments,\u201d Joachim Reitner, a geobiologist and sponge expert at Germany\u2019s University of G\u00f6ttingen told the \u2018Associated Press\u2019<\/a>. \u201cWhat\u2019s most stunning is the timing,\u201d added Paco C\u00e1rdenas, a sponge expert and researcher at Sweden\u2019s Uppsala University. \u201cTo have discovered sponge fossils from close to 900 million years ago will greatly improve our understanding of early animal evolution.\u201d Dr C\u00e1rdenas added: \u201cThis would be the first time that a sponge fossil has been found from before the Cambrian<\/a>, and not only before, but way before \u2014 that\u2019s what\u2019s most exciting.\u201d<\/p>\n<\/div>\n

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Let the debate begin<\/h3>\n

Some within the scientific community are cautious about the findings. The reason is because of ancient Earth\u2019s oxygen levels and the circumstances under which the sponges lived. \u201cHere I am saying, \u2018Uh-oh, the first animals appeared before that.\u2019 So they didn\u2019t require that oxygen. So people may be not so comfortable with it,\u201d Prof. Turner commented in the \u2018USA Today\u2019 article. \u201cThis is not the holy grail. It\u2019s just a step toward a better view on animal evolution. We know there has to have been a time, an episode or an interval of hidden evolution in animals prior to 540 million years ago. The question is \u2013 how far back did it go, and what was it like? That\u2019s the big hole.\u201d<\/p>\n<\/div>\n

More information<\/p>\n<\/div>\n<\/div>\n

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Press release – CORDIS<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Canadian geologist claims to have discovered the oldest animal fossils. The earliest life forms we know of evolved around 3.7 billion years ago. The world\u2019s oldest known animal, Dickinsonia, dates to about 540 million years ago. A discovery in a remote region of north-west Canada is about to change what we understood until now. According […]<\/p>\n","protected":false},"author":101011,"featured_media":77954,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[346,4083,4082],"tags":[2558,350,433],"class_list":{"0":"post-77956","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-eu-news","8":"category-production","9":"category-research-innovation","10":"tag-cordis","11":"tag-investigacion-en","12":"tag-research","13":"entry"},"acf":[],"yoast_head":"\nHave we found the first sign of animal life on Earth? | CDE Almer\u00eda - Centro de Documentaci\u00f3n Europea - Universidad de Almer\u00eda<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cde.ual.es\/en\/have-we-found-the-first-sign-of-animal-life-on-earth\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Have we found the first sign of animal life on Earth? | CDE Almer\u00eda - Centro de Documentaci\u00f3n Europea - Universidad de Almer\u00eda\" \/>\n<meta property=\"og:description\" content=\"Canadian geologist claims to have discovered the oldest animal fossils. 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