{"id":230886,"date":"2026-02-08T21:06:23","date_gmt":"2026-02-09T03:06:23","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/02\/aerobic-respiration-began-hundreds-of-millions-of-years-earlier-than-previously-thought-study-suggests"},"modified":"2026-02-08T21:06:23","modified_gmt":"2026-02-09T03:06:23","slug":"aerobic-respiration-began-hundreds-of-millions-of-years-earlier-than-previously-thought-study-suggests","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/02\/aerobic-respiration-began-hundreds-of-millions-of-years-earlier-than-previously-thought-study-suggests","title":{"rendered":"Aerobic respiration began hundreds of millions of years earlier than previously thought, study suggests"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/aerobic-respiration-began-hundreds-of-millions-of-years-earlier-than-previously-thought-study-suggests.jpg\"><\/a><\/p>\n<p>Oxygen is a vital and constant presence on Earth today. But that hasn\u2019t always been the case. It wasn\u2019t until around 2.3 billion years ago that oxygen became a permanent fixture in the atmosphere, during a pivotal period known as the Great Oxidation Event (GOE), which set the evolutionary course for oxygen-breathing life as we know it today. A new study by MIT researchers suggests some early forms of life may have evolved the ability to use oxygen hundreds of millions of years before the GOE. The findings may represent some of the earliest evidence of aerobic respiration on Earth.<\/p>\n<p>In their <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0031018225008168\" target=\"_blank\">study<\/a> published in the journal <i>Palaeogeography, Palaeoclimatology, Palaeoecology<\/i>, MIT geobiologists traced the evolutionary origins of a key enzyme that enables organisms to use oxygen. The enzyme is found in the vast majority of aerobic, oxygen-breathing lifeforms today. The team discovered that this enzyme evolved during the <a href=\"https:\/\/phys.org\/news\/2025-04-trillion-species-billion-years-ai.html?utm_source=embeddings&utm_medium=related&utm_campaign=internal\" rel=\"related\">Mesoarchean <\/a>\u2014a geological period that predates the Great Oxidation Event by hundreds of millions of years.<\/p>\n<p>The team\u2019s results may help to explain a longstanding puzzle in Earth\u2019s history: Why did it take so long for oxygen to build up in the atmosphere?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Oxygen is a vital and constant presence on Earth today. But that hasn\u2019t always been the case. It wasn\u2019t until around 2.3 billion years ago that oxygen became a permanent fixture in the atmosphere, during a pivotal period known as the Great Oxidation Event (GOE), which set the evolutionary course for oxygen-breathing life as we [\u2026]<\/p>\n","protected":false},"author":662,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-230886","post","type-post","status-publish","format-standard","hentry","category-futurism"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/230886","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/662"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=230886"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/230886\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=230886"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=230886"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=230886"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}