简介：Eachyear,morethan1,000mountainclimbersventuretoDenaliNationalParkinAlaskaandattempttoreachMt.Mckinley'ssummit,thehighestpointinNorthAmerica.Nearlyhalfofthoseadventurersfail,andseveraldietrying-evensomeofthemostphysicallyfitandwell-equippedclimberssuccumbtoastrangeandconfoundingsicknessbrouthtonbyseverecoldandhithaltitude. Inanexplorationofextrememedicalscience,NOVAascendstothetopofDenalitotrytosolvethemysteryofhithaltitudedeathsononeofthemostdangerousmountainsonEarth.DeadlyAscentchroniclesdaringmountainrescues,emergencymedicalevacuations,andcutting-edgescienceexperimentsasateamofresearchers,doctorsandmountaineeringexpertsemployingthelatestNASAtechnologyinvestigatethelethaldiseaseattackingclimbersallovertheworld. ThehithestmountainsonEarthhavealwaysluredadventurerstotheirpeaks,whereclimberspushthelimitsofsurvival.Thankstotheeffortsofresearchersandrescuers,scientistsarecomingclosertodecipheringthedeathsonDenalianddeterminingthebody'spointofnoreturnintheseextremecoldandhighaltitudeconditions.…