{"id":929,"date":"2004-11-16T09:56:00","date_gmt":"2004-11-16T08:56:00","guid":{"rendered":"https:\/\/kids.esa.int\/life_on_mars\/"},"modified":"2026-10-08T00:33:53","modified_gmt":"2026-10-07T22:33:53","slug":"life_on_mars","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/life_on_mars\/","title":{"rendered":"El\u00e4m\u00e4 Marsissa"},"content":{"rendered":"
\n

Jopa suurimmilla teleskoopeilla on eritt\u00e4in vaikeaa havaita Marsista juurikaan yksityiskohtia. 1800-luvun lopulla jotkut tutkijat luulivat n\u00e4kev\u00e4ns\u00e4 planeetan pinnalla kulkevia suoria viivoja. N\u00e4m\u00e4 viivat yhdistiv\u00e4t vihert\u00e4vi\u00e4 alueita, jotka n\u00e4yttiv\u00e4t silt\u00e4 kuin ne olisivat kasvien peitossa. N\u00e4m\u00e4 tutkijat ajattelivat, ett\u00e4 suorat viivat olivat marsilaisten rakentamia kanavia, joiden avulla vesi johdettiin viljelyksille.<\/p>\n<\/div>\n

Avaruusluotainten ottamat kuvat ovat osoittaneet, ett\u00e4 n\u00e4it\u00e4 kanavia ei ole olemassa. Planeetalla ei ole merkkej\u00e4 el\u00e4m\u00e4st\u00e4 \u2013 kasveista tai \u00e4lykk\u00e4ist\u00e4 marsilaisista. Tied\u00e4mme nyt, ett\u00e4 Mars on eritt\u00e4in kylm\u00e4 ja kuiva planeetta, jonka pinnalla nestem\u00e4ist\u00e4 vett\u00e4 ei voi esiinty\u00e4. Napakorkkeilla on kuitenkin laajoja vesij\u00e4\u00e4alueita. J\u00e4\u00e4t\u00e4 on runsaasti my\u00f6s j\u00e4\u00e4tyneess\u00e4 maaper\u00e4ss\u00e4 \u2013 aivan kuten Kanadan ja Ven\u00e4j\u00e4n pohjoisosien ikiroudan alueilla.<\/p>\n

Suuret, kuivat uomat osoittavat my\u00f6s, ett\u00e4 pinnalla oli aikoinaan runsaasti virtaavaa vett\u00e4. Mars Expressin ja muiden avaruusluotainten tuoreet havainnot viittaavat siihen, ett\u00e4 syv\u00e4ll\u00e4 maan alla saattaa olla nestem\u00e4ist\u00e4 vett\u00e4. Jos Mars oli aikoinaan l\u00e4mpim\u00e4mpi ja kosteampi, el\u00e4m\u00e4 on saattanut synty\u00e4 punaisella planeetalla. Yksinkertaista el\u00e4m\u00e4\u00e4, kuten bakteereja, saattaa edelleen esiinty\u00e4 j\u00e4\u00e4tyneen pinnan alla.<\/p>\n

Vuonna 1996 joukko tutkijoita ilmoitti maailmalle l\u00f6yt\u00e4neens\u00e4 todisteita bakteereista Marsista per\u00e4isin olevan meteoriitin sis\u00e4lt\u00e4. T\u00e4m\u00e4 ajatus ei kuitenkaan nauti suurta suosiota useimpien muiden tutkijoiden keskuudessa. Jos Marsista l\u00f6ydett\u00e4isiin tulevaisuudessa el\u00e4m\u00e4\u00e4, se olisi ensimm\u00e4inen todiste siit\u00e4, ettemme ole yksin maailmankaikkeudessa.<\/p>","protected":false},"excerpt":{"rendered":"

Even with the largest telescopes it is very hard to see much detail on Mars. In the late 1800s, some scientists thought they could see straight lines crossing the planet’s […]<\/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\/2002\/07\/the_mars_express_spacecraft_in_orbit_around_mars2\/17863233-3-eng-GB\/The_Mars_Express_spacecraft_in_orbit_around_Mars.jpg","esa_banner_description":"The Mars Express spacecraft in orbit around Mars","esa_banner_credit":"ESA 2001, Illustration by Medialab","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2002\/07\/The_Mars_Express_spacecraft_in_orbit_around_Mars2","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-929","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\/fi\/wp-json\/wp\/v2\/posts\/929","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=929"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/929\/revisions"}],"predecessor-version":[{"id":2072,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/929\/revisions\/2072"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=929"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=929"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=929"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=929"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=929"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=929"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=929"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=929"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=929"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}