{"id":16100,"date":"2026-01-24T17:00:00","date_gmt":"2026-01-24T16:00:00","guid":{"rendered":"https:\/\/holistic.news\/en\/?p=16100"},"modified":"2026-01-22T15:02:31","modified_gmt":"2026-01-22T14:02:31","slug":"ancient-martian-ocean-a-blue-past","status":"publish","type":"post","link":"https:\/\/holistic.news\/en\/ancient-martian-ocean-a-blue-past\/","title":{"rendered":"Mars Wasn\u2019t Always Red: Scientists Uncover Traces of a Vast Sea"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Evidence of Water on the Red Planet<\/h2>\n\n\n\n<p>New research published on January 12, 2026, in the journal <em><a href=\"https:\/\/www.nature.com\/articles\/s44453-025-00015-8\" target=\"_blank\" rel=\"noreferrer noopener\">npj Space Exploration<\/a><\/em>, offers a startlingly different perspective on Mars. It turns out that our neighbor was once a<strong> &#8220;blue world&#8221;<\/strong> where a vast sea dominated the northern landscapes.<\/p>\n\n\n\n<p>This breakthrough resulted from a collaboration between the University of Bern and Italy&#8217;s INAF \u2013 Osservatorio Astronomico di Padova. By analyzing high-resolution images from Mars orbiters, the team identified geological structures nearly identical to river deltas found on Earth.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>While mapping Martian landscapes, I recognized mountains and valleys reminiscent of Earth&#8217;s rugged terrain. However, the deltas I discovered at the edge of a mountain range were particularly striking.<\/p>\n<\/blockquote>\n\n\n\n<p>&#8211; says Ignatius Argadestya, a doctoral student at the University of Bern.<\/p>\n\n\n\n<p>Scientists emphasize that on Earth, such formations only appear where rivers empty into larger bodies of water. According to the study\u2019s authors, these features confirm that an <strong>ancient Martian ocean existed about 3 billion years ago<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Researchers Proved the Existence of an Ancient Martian Ocean<\/h2>\n\n\n\n<p>Although wind-sculpted dunes now cover these ancient delta structures, their original forms remain clearly recognizable. Using these markers, the team reconstructed the former coastline and estimated the basin&#8217;s size with high accuracy. The data shows that this <strong>Martian sea was at least as large as Earth&#8217;s Arctic Ocean<\/strong>, stretching across the planet&#8217;s northern hemisphere.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>We aren&#8217;t the first to suggest the existence of a northern ocean. However, previous claims relied on less precise data or indirect arguments. Our sea-level reconstruction rests on clear evidence of a shoreline, made possible by high-resolution imaging.<\/p>\n<\/blockquote>\n\n\n\n<p>&#8211; explains Fritz Schlunegger, Professor of Exogenic Geology at the University of Bern.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Did Life Once Thrive on Mars?<\/h2>\n\n\n\n<p>The presence of a massive ocean suggests that Mars once possessed the necessary conditions for life to emerge. It also serves as a somber reminder of how planets change over eons.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>We know Mars as a dry, red planet. Yet our results show it was once a blue world, much like Earth. This discovery also highlights how precious water is\u2014and how it can eventually vanish.<\/p>\n<\/blockquote>\n\n\n\n<p>&#8211; Argadestya notes.<\/p>\n\n\n\n<p>Finding traces of an ancient Martian ocean provides a roadmap for future space missions. <a href=\"https:\/\/holistic.news\/en\/mars-sample-return-faces-collapse-nasa-runs-out-of-money\/\" type=\"post\" id=\"16007\">Delta deposits<\/a>, rich in fine-grained material transported by rivers, are prime targets for rovers searching for biosignatures. Just as terrestrial deltas preserve traces of past ecosystems, scientists expect Martian rocks within these structures to hold the secrets of the planet\u2019s biological history.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><em>Read this article in Polish:<\/em> <a href=\"https:\/\/holistic.news\/ocean-na-marsie-przelomowe-odkrycie\/\">Mars nie zawsze by\u0142 czerwony. Naukowcy odkryli \u015blady oceanu<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mars, which today resembles a barren wasteland, once thrived as a blue planet. A groundbreaking study reveals that approximately 3 billion years ago, a massive body of water\u2014at least as large as Earth\u2019s Arctic Ocean\u2014covered its northern hemisphere. For the first time, researchers have reconstructed the coastline of this ancient Martian ocean with unprecedented precision.<\/p>\n","protected":false},"author":283,"featured_media":16101,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[435],"tags":[1412,131,2299,1904],"class_list":["post-16100","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science","tag-life-on-mars","tag-mars","tag-martian-ocean","tag-planet"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Ancient Martian Ocean. A Blue Past.<\/title>\n<meta name=\"description\" content=\"New data confirms an ancient Martian ocean once covered the planet. Discover how scientists found Earth-like deltas in the Red Planet&#039;s dust.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/holistic.news\/en\/ancient-martian-ocean-a-blue-past\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ancient Martian Ocean. A Blue Past.\" \/>\n<meta property=\"og:description\" content=\"New data confirms an ancient Martian ocean once covered the planet. Discover how scientists found Earth-like deltas in the Red Planet&#039;s dust.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/holistic.news\/en\/ancient-martian-ocean-a-blue-past\/\" \/>\n<meta property=\"og:site_name\" content=\"Holistic News\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/portalHolisticNews\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-24T16:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/holistic.news\/en\/wp-content\/uploads\/2026\/01\/Ancient-Martian-Ocean.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"720\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Mariusz Martynelis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@news_holistic\" \/>\n<meta name=\"twitter:site\" content=\"@news_holistic\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Mariusz Martynelis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/holistic.news\\\/en\\\/ancient-martian-ocean-a-blue-past\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/holistic.news\\\/en\\\/ancient-martian-ocean-a-blue-past\\\/\"},\"author\":{\"name\":\"Mariusz Martynelis\",\"@id\":\"https:\\\/\\\/holistic.news\\\/en\\\/#\\\/schema\\\/person\\\/e7dd643ecd889c8e58060e83bab2bce3\"},\"headline\":\"Mars Wasn\u2019t Always Red: Scientists Uncover Traces of a Vast Sea\",\"datePublished\":\"2026-01-24T16:00:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/holistic.news\\\/en\\\/ancient-martian-ocean-a-blue-past\\\/\"},\"wordCount\":438,\"publisher\":{\"@id\":\"https:\\\/\\\/holistic.news\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/holistic.news\\\/en\\\/ancient-martian-ocean-a-blue-past\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/holistic.news\\\/en\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/Ancient-Martian-Ocean.jpg\",\"keywords\":[\"life on Mars\",\"mars\",\"Martian ocean\",\"planet\"],\"articleSection\":[\"Science\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/holistic.news\\\/en\\\/ancient-martian-ocean-a-blue-past\\\/\",\"url\":\"https:\\\/\\\/holistic.news\\\/en\\\/ancient-martian-ocean-a-blue-past\\\/\",\"name\":\"Ancient Martian Ocean. 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