{"id":615391,"date":"2026-01-18T17:22:43","date_gmt":"2026-01-18T16:22:43","guid":{"rendered":"https:\/\/cronologia-universale.it\/544-510-million-bc\/"},"modified":"2026-01-18T17:22:43","modified_gmt":"2026-01-18T16:22:43","slug":"640-million-bc","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/640-million-bc\/","title":{"rendered":"640 million BC"},"content":{"rendered":"<p>possible &#8220;snowball earth&#8221; (Marinoan) event, a terrible ice age in which the oceans froze all the way to the tropics. Life likely survived in limited oases such as the Caribbean, the Red Sea, the Persian Gulf, the Eastern Mediterranean, the Amazon, Central Africa, Indonesia, and Northern Australia. At the end of this latest Snowball Earth event, the oxygen concentration in the air suddenly increased from 1% to 20%, allowing the evolution of large, multicellular organisms.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>possible &#8220;snowball earth&#8221; (Marinoan) event, a terrible ice age in which the oceans froze all&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[39],"tags":[],"class_list":["post-615391","post","type-post","status-publish","format-standard","hentry","category-ge-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>640 million BC - Cronologia Universale<\/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:\/\/cronologia-universale.it\/en\/640-million-bc\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"640 million BC - Cronologia Universale\" \/>\n<meta property=\"og:description\" content=\"possible &#8220;snowball earth&#8221; 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