{"id":1142,"date":"2004-11-19T08:27:00","date_gmt":"2004-11-19T07:27:00","guid":{"rendered":"https:\/\/kids.esa.int\/are_we_alone_life_on_earth\/"},"modified":"2026-10-08T00:36:29","modified_gmt":"2026-10-07T22:36:29","slug":"are_we_alone_life_on_earth","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/et\/are_we_alone_life_on_earth\/","title":{"rendered":"Elu Maal"},"content":{"rendered":"
\n

Keegi ei tea, kuidas v\u00f5i miks elu tekkis. Teame k\u00fcll, et elu Maal sai alguse v\u00e4hemalt 3,8 miljardit (3 800 000 000) aastat tagasi. Selleks ajaks oli noor planeet jahtunud ja moodustanud kivise koore. M\u00f5ned teadlased usuvad, et elu sai alguse kivises veekogus v\u00f5i ookeanis. Teised arvavad, et see v\u00f5is saabuda kosmosest koos komeetide ja asteroidega.<\/p>\n<\/div>\n

Meie teada on Maa ainus koht, kus leidub elu. K\u00f5ikjal meie planeedil, kuhu me ka vaatame, on bakterid ja muud lihtsad eluvormid endale kodu rajanud.<\/p>\n

Taimed ja loomad vajavad kasvamiseks p\u00e4ikesevalgust. 1970. aastateni arvasid teadlased, et elu eksisteerib ainult Maa pinna l\u00e4hedal.<\/p>\n

\"Mars
Mars 5,5 miljoni km kauguselt, pildistatud 1. detsembril<\/figcaption><\/figure>\n

Sellest ajast alates on avastatud baktereid mitme kilomeetri s\u00fcgavusel maa all tahke kivimi sees. Nad toituvad kivimis leiduvatest gaasidest ja mineraalidest. Baktereid on leitud ka tugevates hapetes, Antarktika j\u00e4\u00e4tavas k\u00fclmas ning ookeani pimedates s\u00fcgavustes asuvate kuumaveeallikate l\u00e4hedal. M\u00f5ned suudavad ellu j\u00e4\u00e4da isegi v\u00e4ga radioaktiivsetes kohtades. Niikaua kui vett on olemas, suudab elu jalgealuse leida.<\/p>\n

Kui elu on nii raske, kas see v\u00f5iks siis tekkida ja p\u00fcsida ka teistel planeetidel? Meie P\u00e4ikeses\u00fcsteemis on selleks k\u00f5ige t\u00f5en\u00e4olisem koht Mars.<\/p>","protected":false},"excerpt":{"rendered":"

No one knows how or why life began. We do know that life on Earth started at least 3.8 billion (3 800 000 000) years ago. By this time, the […]<\/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\/2001\/07\/life_in_extreme_conditions_on_earth_raises_hopes_for_life_elsewhere_in_the_universe2\/17864454-3-eng-GB\/Life_in_extreme_conditions_on_Earth_raises_hopes_for_life_elsewhere_in_the_universe.jpg","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2001\/07\/Life_in_extreme_conditions_on_Earth_raises_hopes_for_life_elsewhere_in_the_universe2","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":[14,10,13],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1142","post","type-post","status-publish","format-standard","hentry","category-are-we-alone","category-learn","category-life-in-space","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/1142","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/comments?post=1142"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/1142\/revisions"}],"predecessor-version":[{"id":4868,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/posts\/1142\/revisions\/4868"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/media?parent=1142"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/categories?post=1142"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/tags?post=1142"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/panel?post=1142"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/language?post=1142"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/age?post=1142"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/duration?post=1142"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/resource_type?post=1142"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/audience?post=1142"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/et\/wp-json\/wp\/v2\/wf_post_folders?post=1142"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}