{"id":1132,"date":"2004-11-15T13:40:00","date_gmt":"2004-11-15T12:40:00","guid":{"rendered":"https:\/\/kids.esa.int\/extreme_life\/"},"modified":"2026-10-08T00:36:22","modified_gmt":"2026-10-07T22:36:22","slug":"extreme_life","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/extreme_life\/","title":{"rendered":"\u00c4\u00e4rimm\u00e4inen el\u00e4m\u00e4"},"content":{"rendered":"
\n

Nyky\u00e4\u00e4n tutkijat eiv\u00e4t ole en\u00e4\u00e4 niin varmoja siit\u00e4, ett\u00e4 el\u00e4m\u00e4 olisi alkanut maan pinnalla tai sen l\u00e4heisyydess\u00e4. Minne ikin\u00e4 katsommekin, el\u00e4m\u00e4\u00e4 n\u00e4ytt\u00e4\u00e4 olevan kaikkialla \u2013 jopa useiden kilometrien syvyydess\u00e4 maan alla. Voi olla, ett\u00e4 el\u00e4m\u00e4 sai alkunsa merenpohjasta, jossa kuumat l\u00e4hteet tarjosivat energiaa auringonvalon sijaan.<\/p>\n<\/div>\n

Toinen teoria on, ett\u00e4 el\u00e4m\u00e4 \u2013 tai ainakin sen kemialliset rakennuspalikat \u2013 on per\u00e4isin avaruudesta. Maapallon varhaisessa historiassa siihen t\u00f6rm\u00e4si lukuisia komeettoja. Komeetat sis\u00e4lt\u00e4v\u00e4t runsaasti hiilipohjaisia kemikaaleja, joista el\u00e4m\u00e4 olisi voinut saada alkunsa.<\/p>\n

On my\u00f6s mahdollista, ett\u00e4 el\u00e4m\u00e4 voisi siirty\u00e4 yhdelt\u00e4 planeetalta toiselle. El\u00e4m\u00e4 n\u00e4ytt\u00e4\u00e4 olevan riitt\u00e4v\u00e4n sitke\u00e4\u00e4 selviyty\u00e4kseen pitk\u00e4st\u00e4 matkasta avaruudessa. Suuri komeetta tai meteoriitti, joka t\u00f6rm\u00e4isi Maahan, voisi heitt\u00e4\u00e4 avaruuteen suuren m\u00e4\u00e4r\u00e4n kivi\u00e4. N\u00e4iden kivien mukana matkustavat bakteerit voisivat lopulta laskeutua toiselle planeetalle.<\/p>\n

Samoin Marsista per\u00e4isin oleva meteoriitti voisi tuoda marsilaisen el\u00e4m\u00e4n (jos sellaista olisi olemassa) Maahan. Vuonna 1996 tutkijat ilmoittivat maailmalle l\u00f6yt\u00e4neens\u00e4 juuri t\u00e4llaisen marsilaisen kiven Etel\u00e4mantereelta. Toiset tutkijat kuitenkin kyseenalaistavat heid\u00e4n tutkimuksensa.<\/p>","protected":false},"excerpt":{"rendered":"

Today, scientists are not so sure that life began on or near the Earth’s surface. Everywhere we look, there seems to be life \u2013 even several kilometres underground. It may […]<\/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\/how_does_life_begin_how_does_it_evolve2\/17886729-2-eng-GB\/How_does_life_begin_How_does_it_evolve.jpg","esa_banner_description":"How does life begin? How does it evolve?","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/05\/How_does_life_begin_How_does_it_evolve2","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":[10,11,19],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1132","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-story-of-the-universe","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/1132","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=1132"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/1132\/revisions"}],"predecessor-version":[{"id":2275,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/1132\/revisions\/2275"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=1132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=1132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=1132"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=1132"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=1132"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=1132"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=1132"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=1132"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=1132"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=1132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}