英语翻译Sinceearlytimes,peoplehavebeenfascinatedwiththeideaoflifeexistingsomewhereelsebesidesearth.Untilrecently,scientistsbelievethatlifeonotherplanetswasjustahopefuldream.Butnowtheyarebeginningtolocateplaceswh
英语翻译
Sinceearlytimes,peoplehavebeenfascinatedwiththeideaoflifeexistingsomewhereelsebesidesearth.Untilrecently,scientistsbelievethatlifeonotherplanetswasjustahopefuldream.Butnowtheyarebeginningtolocateplaceswherelifecouldform.In1997,theysawevidenceofplanetsnearotherstarslikethesun.Butscientistsnowthinkthatlifecouldbeevennearerinourownsolarsystem.OneplacescientistsarestudyingverycloselyisEuropa,amoonofJupiter.SpaceprobeshaveprovidedevidencethatEuropahasalargeoceanunderitssurface.TheprobeshavealsomadescientiststhinkthatunderitssurfaceEuropahasarockycoregivingoffvolcanicheat.Waterandheatfromvolcanicactivityaretwobasicconditionsneededforlifetoform.Athirdiscertainbasicchemicalssuchascarbon,oxygenandnitrogen.ScientistsbelievetheremightbesuchchemicalslyingatthebottomofEuropa’socean.Theymayhavealreadycreatedlifeormaybeaboutto.Youmaywonderiflightisalsoneededforlifetoform.Untilrecently,scientiststhoughtthatlightwasessential.Butnow,placeshavebeenfoundonearththatareintotalblacknesssuchascavesseveralmilesbeneaththesurface.Andbacteria,primitiveformsoflife,havebeenseenthere.SothelackoflightinEuropa’ssub-surfaceoceandoesn’tautomaticallyruleoutlifeforming.
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