『神圣使命』介绍:ThejournalsofatrueNASAArcticexpeditionunveilstheadventureofasix-mancrew’saboardanexperimentalvehicledesignedtopreparethefirsthumanexplorationofMars.Avoyageoffearsandsurvival,hopesanddreams,throughthebeautiesandthedeadlydangersoftwoworlds:theHighArcticandMars,aplanetthatmighthidethesecretofourorigins.