{"id":1133,"date":"2004-11-16T08:14:00","date_gmt":"2004-11-16T07:14:00","guid":{"rendered":"https:\/\/kids.esa.int\/planets_and_moons_life_on_earth\/"},"modified":"2026-10-08T00:36:23","modified_gmt":"2026-10-07T22:36:23","slug":"planets_and_moons_life_on_earth","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/nb\/planets_and_moons_life_on_earth\/","title":{"rendered":"Livet p\u00e5 jorden"},"content":{"rendered":"<div class=\"lede\">\n<p>Studier av fossiler i eldgamle bergarter viser at livet sannsynligvis oppsto for rundt 4 milliarder \u00e5r siden, da Jorden var sv\u00e6rt ung. Ingen vet hvordan livet oppsto p\u00e5 Jorden. De fleste forskere mener at det oppsto i flytende vann. Men skjedde dette i vannansamlinger p\u00e5 overflaten, under jorden eller p\u00e5 havbunnen, der vulkansk aktivitet danner varme kilder?<\/p>\n<\/div>\n<p>Fors\u00f8k viser at livets kjemiske byggesteiner kan dannes b\u00e5de i verdensrommet og p\u00e5 jorden. Mange av dem m\u00e5 ha kommet til jorden med meteoritter og kometer. P\u00e5 en eller annen m\u00e5te kom disse enkle \u2018organiske\u2019 kjemikaliene sammen og dannet mer avanserte molekyler. Deretter begynte de \u00e5 kopiere seg selv og vokse.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"264\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/09\/Dry_earth3\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2004\/09\/dry_earth3\/17868598-2-eng-GB\/Dry_earth.jpeg\" alt=\"Dry earth\"><figcaption>T\u00f8rr jord<\/figcaption><\/figure>\n<p>Det vi vet, er at \u2013 n\u00e5r det f\u00f8rst kommer i gang \u2013 er livet utrolig t\u00f8ft. Man har funnet levende bakterier i det frosne Antarktis, i kokende varmt vann og inne i bergarter opptil fem kilometer under jorden. Vi vet ogs\u00e5 at slike organismer kan overleve i \u00e5revis i det barske milj\u00f8et i verdensrommet.<\/p>\n<p>Da plantene ble utbredt, ble det frigjort store mengder oksygen i luften. Jorden ble den eneste planeten i solsystemet v\u00e5rt med en oksygenrik atmosf\u00e6re. Ved \u00e5 lete etter oksygen p\u00e5 andre planeter kan vi en dag finne bevis p\u00e5 utenomjordisk liv.<\/p>","protected":false},"excerpt":{"rendered":"<p>Studies of fossils in ancient rocks tell us that life probably began about 4 billion years ago, when the Earth was very young. No one knows how life began on [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2003\/05\/dna_s_famous_double-helix_structure3\/17902899-2-eng-GB\/DNA_s_famous_double-helix_structure.jpg","esa_banner_description":"DNA's famous double-helix structure","esa_banner_credit":"ESA 2003. 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