{"id":20657,"date":"2022-09-18T11:19:39","date_gmt":"2022-09-18T11:19:39","guid":{"rendered":"https:\/\/www.africa-press.net\/mauritius\/?p=20657"},"modified":"2022-09-18T11:13:32","modified_gmt":"2022-09-18T11:13:32","slug":"worlds-oldest-heart-found-in-prehistoric-fish-2","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/mauritius\/all-news\/worlds-oldest-heart-found-in-prehistoric-fish-2","title":{"rendered":"World\u2019s oldest heart found in prehistoric fish"},"content":{"rendered":"

Africa-Press – Mauritius. <\/strong><\/span>Researchers have discovered a 380-million-year-old heart preserved inside a fossilised prehistoric fish. They say the specimen captures a key moment in the evolution of the blood-pumping organ found in all back-boned animals, including humans.<\/p>\n

The heart belonged to a fish known as the Gogo, which is now extinct. The \u201cjaw-dropping\u201d discovery, published in the journal Science, was made in Western Australia.<\/p>\n

The lead scientist, Prof Kate Trinajstic from Curtin University in Perth told BBC News about the moment she and her colleagues realised that they had made the biggest discovery of their lives.<\/p>\n

\u201cWe were crowded around the computer and recognised that we had a heart and pretty much couldn\u2019t believe it! It was incredibly exciting,\u201d she said.<\/p>\n

Usually, it is bones rather than soft tissues that are turned into fossils \u2013 but at this location in Kimberley, known as the Gogo rock formation \u2013 minerals have preserved many of the fish\u2019s internal organs, including the liver, stomach, intestine and heart.<\/p>\n

\u201cThis is a crucial moment in our own evolution,\u201d said Prof Trinajstic.<\/p>\n

\u201cIt shows the body plan that we have evolved very early on, and we see this for the very first time in these fossils.<\/p>\n

\u201d Her collaborator, Prof John Long from Flinders University in Adelaide, described the find as \u201ca mind-boggling, jaw-dropping discovery\u201d.<\/p>\n

\u201cWe have never known anything about the soft organs of animals this old, until now,\u201d he said. The Gogo fish is the first of a class of prehistoric fish called placoderms. These were the first fish to have jaws and teeth.<\/p>\n

Before them, fishes were no bigger than 30cm, but placoderms could grow up to 29.5ft (9m) in length. Placoderms were the planet\u2019s dominant life form for 60 million years, existing more than 100 million years before the first dinosaurs walked the Earth.<\/p>\n

Scans of the Gogo fish fossil showed that its heart was more complex than expected for these primitive fish. It had two chambers one on top of each other, similar in structure to the human heart.<\/p>\n

The researchers suggest this made the animal\u2019s heart more efficient and was the critical step that transformed it from a slow-moving fish to a fast-moving predator.<\/p>\n

\u201cThis was the way they could up the ante and become a voracious predator,\u201d said Prof Long. The other important observation was that the heart was much more forward in the body than those of more primitive fish.<\/p>\n

This position is thought to have been associated with the development of the Gogo fish\u2019s neck and made space for the development of lungs further down the evolutionary line.<\/p>\n

Dr Zerina Johanson of the Natural History Museum, London, who is a world leader in placoderms, and is independent of Prof Trinajstic\u2019s team, described the research as an \u201cextremely important discovery\u201d that helps to explain why the human body is the way it is today.<\/p>\n

\u201cA lot of the things you see we still have in our own bodies; jaws and teeth, for example. We have the first appearance of the front fins and the fins at the back, which eventually evolved into our arms and legs.<\/p>\n

\u201cThere are many things going on in these placoderms that we see evolving to ourselves today such as the neck, the shape and arrangement of the heart and its position in the body.<\/p>\n

\u201d<\/p>\n

The discovery fills in an important step in the evolution of life on Earth, according to Dr Martin Brazeau, a placoderm expert at Imperial College London, who is also independent of the Australian research team.<\/p>\n

\u201cIt\u2019s really exciting to see this result,\u201d he told BBC News.<\/p>\n

\u201cThe fishes that my colleagues and I are studying are part of our evolution. This is part of the evolution of humans and other animals that live on land and the fishes that live in the sea today.\u201d<\/p>\n

For More News And Analysis About Mauritius<\/a> Follow Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Mauritius. Researchers have discovered a 380-million-year-old heart preserved inside a fossilised prehistoric fish. They say the specimen captures a key moment in the evolution of the blood-pumping organ found in all back-boned animals, including humans. The heart belonged to a fish known as the Gogo, which is now extinct. The \u201cjaw-dropping\u201d discovery, published […]<\/p>\n","protected":false},"author":84,"featured_media":20656,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,8,9,16],"tags":[233,245,2210,241],"class_list":["post-20657","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-all-news","category-homepage-english","category-miscellaneous","category-twitter","tag-africa-press","tag-africa-press-mauritius","tag-bbc","tag-mauritius"],"yoast_head":"\nWorld\u2019s oldest heart found in prehistoric fish - Mauritius<\/title>\n<meta name=\"description\" content=\"Researchers have discovered a 380-million-year-old heart preserved inside a fossilised prehistoric fish. 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