题目内容：
听音频，回答题 Wemightnotbealoneintheuniverse.Actually,itmaybe26asaverycrowdedplacebynewcomputermodelsdevelopedtohelpidentify27planets.
Estimatesofplacesthatcansustainlifehavebeen28thelikelihoodofthemhavingsurfacewater.ButsoftwarerecentlydevelopedbytheAberdeenUniversityallowsresearcherstoidentifyplanetswithundergroundwaterkeptliquidbyplanetaryheat.
Wateris29forlifeandplanetstooclosetothesunlosewatertothe30throughevaporation(蒸发).Ontheotherhand,planetslocatedindistantreachesfromtheirstarhavetheirsurfacewaterlockedawayasice.
ScanMcMahon,whoiscarryingoutthework,explainedthat31peoplehavesaidthatifaplanetisinthisGoldilockszone,whichmeansitisneithertoohotnortoocold,itcanhave32onitssurfaceandbehabitable.Butthisperceptionmightchangewhenconsideringthatplanetscanreceivetwosourcesofheat—heatdirectfromthestarandheat33deepinsidetheplanet.Itiseasytoobserveitinourownplanet.AsyoudescendthroughthecrustoftheEarth,thetemperaturegetshigherandhigher.Evenwhenthesurfaceoftheplanetis34,watercanexistbelowground.Therecouldbeimmensequantitiesofwaterfullofprimitivelife.SotheAberdeenteamisdevelopingmodelstopredictwhichfar-awayplanetsmightharborundergroundreservoirsofliquidwaterwiththepossibilityof35life.
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