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LifeclingsoninthedriestcornersoftheEarth

LivingintheAtacamadesert

ITDOESnotrainmuchintheAtacamadesert.A1,kmstripoflandrunningalongtheChileancoast,itisEarth’sdriestdesertoutsideitspoles.Averageannualrainfallincertainpartscanbeaslowasamillimetreortwoayear,andsomeAtacamanweatherstationshaveneverseenadropofwater.

Yetitdoesrainoccasionally.AndasDirkSchulze-Makuch,anastrobiologistattheTechnicalUniversityofBerlin,andhiscolleaguesreportinProceedingsoftheNationalAcademyofSciences,adesertdownpourinofferedtheperfectnaturalexperimentforprobingthelimitsofwhatsortsofconditionslifecantolerate.

TheAtacamaisnotquitelifeless.Afewspecialisedanimalsandplantsscrapealivinginthelessaridparts.Andscientistshavefoundevidenceofmicrobiallifeevenintheverydriestareas.Whatislessclear,though,iswhetherthosemicrobesarenativesabletoenduresuchextremearidity,perhapsbybe







































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