{"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\/hu\/planets_and_moons_life_on_earth\/","title":{"rendered":"Az \u00e9let a F\u00f6ld\u00f6n"},"content":{"rendered":"
\n

Az \u0151si k\u0151zetekben tal\u00e1lhat\u00f3 fossz\u00edli\u00e1k vizsg\u00e1lata alapj\u00e1n az \u00e9let val\u00f3sz\u00edn\u0171leg k\u00f6r\u00fclbel\u00fcl 4 milli\u00e1rd \u00e9vvel ezel\u0151tt kezd\u0151d\u00f6tt, amikor a F\u00f6ld m\u00e9g nagyon fiatal volt. Senki sem tudja, hogyan keletkezett az \u00e9let a F\u00f6ld\u00f6n. A tud\u00f3sok t\u00f6bbs\u00e9ge \u00fagy v\u00e9li, hogy foly\u00e9kony v\u00edzben keletkezett. De vajon ez a felsz\u00ednen l\u00e9v\u0151 tavakban t\u00f6rt\u00e9nt, vagy a f\u00f6ld alatt, esetleg az \u00f3ce\u00e1nok fenek\u00e9n, ahol a vulk\u00e1ni tev\u00e9kenys\u00e9g forr\u00f3 forr\u00e1sokat hoz l\u00e9tre?<\/p>\n<\/div>\n

A k\u00eds\u00e9rletek azt mutatj\u00e1k, hogy az \u00e9let k\u00e9miai \u00e9p\u00edt\u0151elemei kialakulhatnak az \u0171rben vagy a F\u00f6ld\u00f6n is. K\u00f6z\u00fcl\u00fck sok biztosan hull\u00f3 meteoritokkal \u00e9s \u00fcst\u00f6k\u00f6s\u00f6kkel \u00e9rkezett a F\u00f6ldre. Valamilyen m\u00f3don ezek az egyszer\u0171 \u2018szerves\u2019 vegyi anyagok \u00f6sszekapcsol\u00f3dtak, \u00e9s fejlettebb molekul\u00e1kat alkottak. Ezut\u00e1n elkezdtek \u00f6nmagukat lem\u00e1solni \u00e9s n\u00f6vekedni.<\/p>\n

\"Dry
Sz\u00e1raz f\u00f6ld<\/figcaption><\/figure>\n

Azt viszont tudjuk, hogy \u2013 ha egyszer elindul \u2013 az \u00e9let hihetetlen\u00fcl kem\u00e9ny. \u00c9l\u0151 bakt\u00e9riumokat tal\u00e1ltak a fagyos Antarktiszon, forr\u00f3 v\u00edzben \u00e9s ak\u00e1r \u00f6t kilom\u00e9ter m\u00e9lys\u00e9gben a f\u00f6ld alatt, a szikl\u00e1k belsej\u00e9ben is. Azt is tudjuk, hogy az ilyen organizmusok \u00e9vekig k\u00e9pesek t\u00fal\u00e9lni az \u0171r zord k\u00f6rnyezet\u00e9ben.<\/p>\n

Amint a n\u00f6v\u00e9nyek elterjedtek, nagy mennyis\u00e9g\u0171 oxig\u00e9n ker\u00fclt a leveg\u0151be. A F\u00f6ld lett a Naprendszer\u00fcnkben az egyetlen bolyg\u00f3, amelynek oxig\u00e9nben gazdag l\u00e9gk\u00f6re van. Ha m\u00e1s bolyg\u00f3kon is oxig\u00e9nt keres\u00fcnk, egy nap tal\u00e1n bizony\u00edt\u00e9kot tal\u00e1lhatunk idegen \u00e9letre.<\/p>","protected":false},"excerpt":{"rendered":"

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 […]<\/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. Illustration by Medialab.","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/05\/DNA_s_famous_double-helix_structure3","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,11,12],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1133","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/1133","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/comments?post=1133"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/1133\/revisions"}],"predecessor-version":[{"id":4865,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/1133\/revisions\/4865"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/media?parent=1133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/categories?post=1133"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/tags?post=1133"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/panel?post=1133"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/language?post=1133"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/age?post=1133"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/duration?post=1133"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/resource_type?post=1133"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/audience?post=1133"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/wf_post_folders?post=1133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}