{"id":18654,"date":"2018-07-25T02:26:22","date_gmt":"2018-07-25T02:26:22","guid":{"rendered":"https:\/\/www.natgeokids.com\/?p=18654"},"modified":"2018-07-25T06:22:42","modified_gmt":"2018-07-25T06:22:42","slug":"science-dr-karl-hole-through-earth","status":"publish","type":"post","link":"https:\/\/www.natgeokids.com\/uk\/discover\/geography\/general-geography\/science-dr-karl-hole-through-earth\/","title":{"rendered":"Science with Dr Karl: digging a hole through Earth"},"content":{"rendered":"<p><a href=\"https:\/\/cdn.creatureandcoagency.com\/uploads\/2018\/07\/holeintheearth.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-18655\" src=\"https:\/\/cdn.creatureandcoagency.com\/uploads\/2018\/07\/holeintheearth.jpg\" alt=\"\" width=\"635\" height=\"404\" srcset=\"https:\/\/cdn.creatureandcoagency.com\/uploads\/2018\/07\/holeintheearth.jpg 635w, https:\/\/cdn.creatureandcoagency.com\/uploads\/2018\/07\/holeintheearth-300x191.jpg 300w\" sizes=\"(max-width: 635px) 100vw, 635px\" \/><\/a><\/p>\n<p>Have you ever thought of digging a hole in your backyard deep enough to take you to the other side of the world? Suppose you really could drill a hole right though the centre of the Earth. What would happen if you jumped in?<\/p>\n<p>It\u2019s going to be tricky drilling through about 12,750km of solid rock, molten lava, liquid iron and solid iron! Let\u2019s just pretend for a moment&#8230; We would have to make the tunnel out of some special material (that doesn\u2019t exist yet, but that could withstand the incredible pressure and temperature at the centre of the Earth).<\/p>\n<p><strong>TUNNELLING TO THE SOUTH POLE <\/strong><\/p>\n<p>To make it easier, we jump straight from the North to the South Pole (so the spinning of the Earth doesn\u2019t scrape you against the wall of the tunnel). At the moment you jump in, the entire mass of the Earth is ahead of you \u2013 pulling you with its gravity. By the time you reach the dead centre, you are moving at about 28,000 km\/h!<\/p>\n<p>If you could magically stop in the middle, you would just float. The weight of the Earth ahead of you would be exactly balanced by the weight of the Earth behind you. But it\u2019s not easy to stop, because you\u2019re travelling at such a great speed! After you cross the midpoint, you begin to slow down.<\/p>\n<p>About 38 minutes after entering the tunnel, you pop out of the other side of the Earth. Now you either pull yourself out of the tunnel, or just let yourself drop back and forth forever \u2013 until you get sick of it!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Have you ever thought of digging a hole in your backyard deep enough to take you to the other side of the world? Suppose you really could drill a hole right though the centre of the Earth. What would happen if you jumped in? It\u2019s going to be tricky drilling through about 12,750km of solid &hellip; <a href=\"https:\/\/www.natgeokids.com\/uk\/discover\/geography\/general-geography\/science-dr-karl-hole-through-earth\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Science with Dr Karl: digging a hole through Earth<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":18656,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[24],"tags":[1922,660,2224,2337,2338,2339,1255,676,1256,2336],"christmas-category":[],"class_list":["post-18654","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general-geography","tag-dr-karl","tag-earth","tag-gravity","tag-hole","tag-iron","tag-molten","tag-north-pole","tag-rock","tag-south-pole","tag-tunnelling","countries-australia","countries-new-zealand"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>hole through earth | science with dr karl | national geographic kids<\/title>\n<meta name=\"description\" content=\"Have you ever thought of digging a hole in your backyard deep enough to take you to the other side of the world? 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Could you drill a hole though Earth?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.natgeokids.com\/nz\/discover\/geography\/general-geography\/science-dr-karl-hole-through-earth\/\" \/>\n<meta property=\"og:site_name\" content=\"National Geographic Kids\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/ngkids\/\" \/>\n<meta property=\"article:published_time\" content=\"2018-07-25T02:26:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2018-07-25T06:22:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdn.creatureandcoagency.com\/uploads\/2018\/07\/holeintheearthfeature.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"300\" \/>\n\t<meta property=\"og:image:height\" content=\"210\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Gemma Chandler\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@NGKidsUK\" \/>\n<meta name=\"twitter:site\" content=\"@NGKidsUK\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Gemma Chandler\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.natgeokids.com\\\/nz\\\/discover\\\/geography\\\/general-geography\\\/science-dr-karl-hole-through-earth\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.natgeokids.com\\\/nz\\\/discover\\\/geography\\\/general-geography\\\/science-dr-karl-hole-through-earth\\\/\"},\"author\":{\"name\":\"Gemma Chandler\",\"@id\":\"https:\\\/\\\/www.natgeokids.com\\\/uk\\\/#\\\/schema\\\/person\\\/195f18ea012555b4e0786f55a65c617e\"},\"headline\":\"Science with Dr Karl: digging a hole through Earth\",\"datePublished\":\"2018-07-25T02:26:22+00:00\",\"dateModified\":\"2018-07-25T06:22:42+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.natgeokids.com\\\/nz\\\/discover\\\/geography\\\/general-geography\\\/science-dr-karl-hole-through-earth\\\/\"},\"wordCount\":281,\"commentCount\":3,\"image\":{\"@id\":\"https:\\\/\\\/www.natgeokids.com\\\/nz\\\/discover\\\/geography\\\/general-geography\\\/science-dr-karl-hole-through-earth\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/cdn.creatureandcoagency.com\\\/uploads\\\/2018\\\/07\\\/holeintheearthfeature.jpg\",\"keywords\":[\"dr karl\",\"earth\",\"gravity\",\"hole\",\"iron\",\"molten\",\"north pole\",\"rock\",\"south pole\",\"tunnelling\"],\"articleSection\":[\"General Geography\"],\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.natgeokids.com\\\/nz\\\/discover\\\/geography\\\/general-geography\\\/science-dr-karl-hole-through-earth\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.natgeokids.com\\\/nz\\\/discover\\\/geography\\\/general-geography\\\/science-dr-karl-hole-through-earth\\\/\",\"url\":\"https:\\\/\\\/www.natgeokids.com\\\/nz\\\/discover\\\/geography\\\/general-geography\\\/science-dr-karl-hole-through-earth\\\/\",\"name\":\"hole through earth | science with dr karl | national geographic kids\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.natgeokids.com\\\/uk\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.natgeokids.com\\\/nz\\\/discover\\\/geography\\\/general-geography\\\/science-dr-karl-hole-through-earth\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.natgeokids.com\\\/nz\\\/discover\\\/geography\\\/general-geography\\\/science-dr-karl-hole-through-earth\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/cdn.creatureandcoagency.com\\\/uploads\\\/2018\\\/07\\\/holeintheearthfeature.jpg\",\"datePublished\":\"2018-07-25T02:26:22+00:00\",\"dateModified\":\"2018-07-25T06:22:42+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.natgeokids.com\\\/uk\\\/#\\\/schema\\\/person\\\/195f18ea012555b4e0786f55a65c617e\"},\"description\":\"Have you ever thought of digging a hole in your backyard deep enough to take you to the other side of the world? 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