{"id":96137,"date":"2019-09-12T18:42:24","date_gmt":"2019-09-13T01:42:24","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2019\/09\/earths-magnetic-field-initiated-a-pole-flip-many-millennia-before-the-switch"},"modified":"2019-09-12T18:42:24","modified_gmt":"2019-09-13T01:42:24","slug":"earths-magnetic-field-initiated-a-pole-flip-many-millennia-before-the-switch","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2019\/09\/earths-magnetic-field-initiated-a-pole-flip-many-millennia-before-the-switch","title":{"rendered":"Earth\u2019s Magnetic Field Initiated a Pole Flip Many Millennia before the Switch"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/earths-magnetic-field-initiated-a-pole-flip-many-millennia-before-the-switch.jpg\"><\/a><\/p>\n<p>Lava flow records and sedimentary and Antarctic ice core data show evidence of planetary magnetic field activity 20,000 years before the beginning of the last pole reversal.<\/p>\n<p><a href=\"https:\/\/www.scientificamerican.com\/podcast\/episode\/cholesterol-climbs-after-crows-chomp-cheeseburgers\/#transcripts-body\" class=\"\" aria-label=\"Cholesterol Climbs after Crows Chomp Cheeseburgers transcript\">Full Transcript<\/a><\/p>\n<p>Earth\u2019s magnetic field\u2014which creates our planet\u2019s north and south pole\u2014<a href=\"https:\/\/www.scientificamerican.com\/article\/are-the-earths-magnetic-p\/\" target=\"_blank\">is far from fixed<\/a>. In fact, the field is quite active; sometimes it weakens, and even reverses, causing Earth\u2019s polarity to switch. These periods of instability don\u2019t happen very often, though\u2014only about every 100,000 to million years. That\u2019s part of why this phenomenon has largely remained a mystery for scientists. However, a recent study may help researchers better understand how long and how complicated Earth\u2019s magnetic field reversals really are.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Lava flow records and sedimentary and Antarctic ice core data show evidence of planetary magnetic field activity 20,000 years before the beginning of the last pole reversal. Full Transcript Earth\u2019s magnetic field\u2014which creates our planet\u2019s north and south pole\u2014is far from fixed. In fact, the field is quite active; sometimes it weakens, and even reverses, [\u2026]<\/p>\n","protected":false},"author":513,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-96137","post","type-post","status-publish","format-standard","hentry","category-futurism"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/96137","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\/513"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=96137"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/96137\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=96137"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=96137"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=96137"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}