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Narrator: ON THIS EPISODE OF "DUAL SURVIVAL"...

Joe: IT IS THE MOST DESOLATE, GODFORSAKEN PIECE OF LAND

I'VE EVER SEEN.

THERE'S NOT EVEN ROCKS HERE.

WHAT THE HELL KIND OF A DESERT DON'T HAVE [BLEEP] ROCKS?

Narrator: MATT AND JOE TAKE ON THE BOLIVIAN ANDES...

iHOLA!

...WHERE THE HIGH ALTITUDE AND DESERT

MAKE THIS LANDSCAPE LETHAL.

HUMAN BEINGS ARE NOT MEANT TO SURVIVE IN A PLACE LIKE THIS.

Narrator: LOOKS CAN BE DECEIVING.

Joe: IT LOOKS LIKE A GIANT BLOODY MARY.

Narrator: AND SURVIVAL COMES ONE DROP AT A TIME.

[ SPITS ] [BLEEP] IT ACTUALLY BURNS.

Matt: WE'VE GOT DISCOLORED WATER, HEAVY MINERALS,

AND IT'S DEVOID OF LIFE.

THIS COULD BE AN ARSENIC POND.

[ SPITS, BLEEP ]

Narrator: SPECIAL OPERATIONS VETERAN JOE TETI

AND PRIMITIVE HUNTER-GATHERER MATT GRAHAM,

TWO GUYS WITH TWO OPPOSING SURVIVAL STRATEGIES...

[ BLEEP ]

...DEMONSTRATE HOW TO THRIVE

IN ONE OF THE MOST EXTREME ENVIRONMENTS ON THE PLANET...

Joe: HIGH ALTITUDE, HIGH WINDS, DEHYDRATION, EXPOSURE.

Narrator: ...AND MAKE IT OUT ALIVE.

WHAT COULD POSSIBLY GO WRONG?

MATT!

-- Captions by VITAC -- www.vitac.com

CAPTIONS PAID FOR BY DISCOVERY COMMUNICATIONS

Narrator: BOLIVIA --

A WILD LANDSCAPE OF EXTREME CONTRASTS.

THE EASTERN REGIONS OF THIS LANDLOCKED COUNTRY

BOAST THE LOW-LYING AMAZON BASIN.

BUT TO THE WEST LIE THE RUGGED ANDES MOUNTAINS,

WHERE SNOWCAPPED PEAKS TOWER OVER GRASSY PLATEAUS

AND VAST SALT FLATS...

BOLIVIA'S PROBABLY GOT THE MOST DIVERSE TERRAIN I'VE EVER SEEN.

Matt: WITH ALL THAT TERRAIN, THERE'S DANGERS.

IT'S A VERY ADVENTUROUS PLACE.

IT'S NOT FOR THE AVERAGE TOURIST.

Narrator: MORE THAN ONE-THIRD OF THE COUNTRY SITS

ABOVE 11,000 FEET IN ELEVATION,

WHERE THERE IS LITTLE PROTECTION FROM THE COLD,

DRY WINDS THAT BLOW ALL YEAR 'ROUND

AND ONLY COMPOUND THE BRUTAL EFFECTS OF SUN EXPOSURE

AND THIN AIR THAT IMPACT NEARLY EVERY VISITOR.

Joe: YOU'RE GONNA BE DEALING WITH A LOT

OF ENVIRONMENTAL PRESSURES.

Matt: HIGH ELEVATIONS, LACK OF OXYGEN, EXTREME EXPOSURE,

SO YOU HAVE HOT TEMPERATURES DURING THE DAY AND FREEZING COLD

TEMPERATURES AT NIGHT THAT CAN KILL YOU.

Narrator: IN THIS SCENARIO, A PAIR OF AMATEUR ASTRONOMERS

DRIVE TO THE CENTER OF A LARGE SALT FLAT.

BUT WHEN CAR TROUBLE LEAVES THEM STRANDED

IN THE VAST WHITENESS, THEY ATTEMPT TO WALK TO RESCUE.

Matt: THEY MADE A CALCULATED RISK TO GO AHEAD AND WALK AWAY

FROM THEIR VEHICLE.

Joe: THAT IS TEXTBOOK STUPID.

WALKIN' AWAY INTO THIS NOTHINGNESS?

THIS IS PROBABLY THE MOST DESOLATE, GODFORSAKEN PLACE

I'VE EVER BEEN TO, DUDE.

YEAH, NO DOUBT. I STILL CAN'T WRAP MY HEAD AROUND IT.

HUMAN BEINGS ARE NOT MEANT TO SURVIVE IN A PLACE LIKE THIS.

THERE IS NOTHING. THERE ARE NO RESOURCES.

YOU'RE EXPOSED TO THE SUN. THERE'S NOT EVEN ROCKS HERE.

IT'S ACTUALLY QUITE SCARY.

OH, LOOK AT THIS.

THAT'S ABOUT THE LONELIEST BACKPACK I'VE EVER SEEN.

[ LAUGHS ]

ALL RIGHT.

LET'S SEE WHAT WE GOT HERE, MATT.

AH, STAR CHART FOR SURE.

THESE FOLKS ARE OUT HERE STARGAZING.

STANDS TO REASON THEY'D HAVE A STAR MAP.

THAT MAY COME IN HANDY.

YEAH.

WHAT WE MAY USE IT FOR IS NAVIGATING AT NIGHT.

GOT SOME GRAPH PAPER.

YEAH, MARKIN' OUT STARS A LITTLE BIT.

PIECE OF PLASTIC MIGHT COME IN HANDY.

GOT SOME KINDA SATCHEL IN HERE, MATT.

WE'VE GOT A PEN AND A DRY-ERASE MARKER.

[ SIGHS ]

WHAT'S THAT?

THIS IS ONE OF THOSE CHEAP-ASS PONCHOS.

THEY'RE FLIMSY, THEY DON'T LAST LONG,

BUT IT'S STILL A BIG PIECE OF MATERIAL.

IT COULD COME IN HANDY.

TRIPOD AND TELESCOPE.

CAN YOU SEE OUT OF IT?

YEAH.

IN A PLACE THAT'S SO VAST AND SO DISTANT LIKE THIS,

HAVING A TELESCOPE IS YOUR SALVATION TO BE ABLE TO SEE

A LONG WAY AND SPOT CIVILIZATION.

YEAH, THAT'S A GOOD PIECE OF KIT TO HAVE OUT HERE.

LAST BUT NOT LEAST...

OH, A COMPASS.

LOOK AT THAT.

THAT NEEDLE'S SPINNIN' QUITE A BIT.

[ LAUGHS ] NO WONDER THEY'RE LOST.

Joe: THIS PLACE IS PACKED FULL OF LITHIUM

AND ALL KIND OF MINERAL DEPOSITS.

A MAGNETIC COMPASS DOES NOT WORK HERE, PERIOD.

SO, MATT, WHAT ARE YOUR THOUGHTS, MAN?

HOW FAR AWAY DO YOU THINK THOSE MOUNTAINS ARE FROM HERE?

JUST LOOKING AT THE WAY THE TRAIN'S SLOPING DOWN

IN THERE, AND THE HAZE IN FRONT OF IT,

I MEAN, THERE'S ALMOST A MIRAGE IN FRONT.

MM-HMM.

I WOULD SAY AT LEAST 50 MILES.

MAYBE THAT SNOWCAPPED MOUNTAIN MIGHT BE 100 MILES AWAY.

THE SALT PAN OUT HERE IS BASICALLY LIKE A BIG FUN HOUSE.

THERE'S ALL KINDS OF ILLUSIONS. THE LIGHTS ARE BENDING.

AND THEN YOU SEE THESE LANDMASSES THAT LOOK LIKE

THEY'RE FLOATING IN MIDAIR BECAUSE THERE'S THIS

MIRAGE HAPPENING UNDERNEATH IT.

I'LL GRAB THAT TELESCOPE, AND I'LL SEE IF I CAN SPOT

ANYTHING OUT HERE.

DO YOU NEED THE TRIPOD?

NO, MAN.

I'M GONNA GRAB A COUPLE THINGS JUST TO MAKE

A LITTLE SHADOW STICK, TRY TO GET A BETTER REFERENCE.

GOOD IDEA.

IN A SITUATION LIKE THIS, YOU CANNOT GO HALF-COCKED.

YOU'VE GOT TO PICK A DIRECTION

AND KNOW WHY YOU'RE GOING THAT DIRECTION.

Narrator: JOE SCOUTS THE PERIMETER IN SEARCH OF

THE CLOSEST LANDMASS OUTSIDE OF THE SALT FLAT,

WHILE MATT WORKS ON A TOOL TO DETERMINE A CARDINAL DIRECTION

IN THE VAST WHITENESS.

JUST TO GET A REFERENCE ON THE SUN,

SEE THE SHADOW RIGHT THERE.

I'M LOOKIN' AT THIS TRIPOD, AND I BASICALLY GOT

SOMETHING THAT'LL STAND UPRIGHT.

AND THAT MEANS IT'S GONNA CAST A FIXED SHADOW.

SO BY WATCHING THE SHADOW, SEEING HOW IT TRACKS,

I'LL GET AN IDEA OF WHAT THE SUN'S DOING

IN THIS PARTICULAR REGION OF THE WORLD.

SO THAT'S GONNA GIVE ME A FIXED POINT RIGHT DOWN HERE.

AND WHAT I'M GONNA DO IS, I'M GONNA TAKE

THE TIP OF THIS PEN AND SET IT THERE.

AND BASICALLY, I'M GONNA LEAVE IT LONG ENOUGH

TO GET ANOTHER POINT,

AND THAT'LL GIVE ME A MORE SOLID DIRECTION.

AS THE SUN TRAVELS, IT'S GONNA CREATE A SHADOW TRAIL.

SO I'M GONNA MARK THE FIRST POINT,

AND THEN I'M GONNA MARK THE SECOND POINT.

AND THAT'LL GIVE ME AN ARC OF THE SUN.

AS YOU SEE, FROM THIS POINT, AS IT'S BEEN MOVING TO THE NORTH,

YOU CAN SEE IT'S BROUGHT THAT SHADOW TO THIS POINT RIGHT HERE.

WHAT'S THE GOOD NEWS, KEMOSABE?

WELL, I'M GLAD WE DID THIS 'CAUSE WHAT I LEARNED IS THAT

THE SUN, 'CAUSE WE'RE SO FAR SOUTH OF THE EQUATOR,

IS ACTUALLY TRACKING QUITE A BIT FURTHER NORTH THAN I REALIZED,

PUTTING EAST DEAD CENTER OF THESE TWO LINES.

ALL RIGHT.

I SCANNED ALL THE WAY AROUND, 360.

I DIDN'T SEE ANYTHING SHIMMERIN' OUT THERE, NO ODD SHAPES.

CHILE IS TO THE WEST, WHICH IS DESERT.

WE DON'T WANNA GO THERE.

SO I THINK OUR ONLY BET IS TO HEAD EAST.

MOTHER NATURE HAS PRETTY MUCH MADE UP OUR MIND FOR US.

WE CAN'T GO WEST BECAUSE THAT'S CHILE AND THE DESERT,

AND THERE'S NOTHING THERE.

SO WE'RE GONNA HEAD EAST, EVEN THOUGH WE DON'T SEE ANYTHING.

HOPEFULLY WE'RE GONNA BUMP INTO SOME KINDA TERRAIN FEATURE

THAT WE CAN MANEUVER TO.

SO IF WE WALK DIRECTLY EAST, AND THE SUN'S RIGHT THERE...

OKAY. I'LL KEEP AN EYE ON YOUR SHADOW.

TRY TO KEEP A STRAIGHT PACE.

OKAY.

SO...

YEAH.

WE DON'T HAVE A LUXURY OF BEING WRONG

IN NAVIGATION RIGHT NOW.

WE'VE GOT TO TRY TO WALK IN THE STRAIGHTEST LINE POSSIBLE.

THIS IS NOT AN EXACT SCIENCE BY ANY STRETCH OF THE IMAGINATION,

BUT IT'S ALL WE HAVE.

I'M CHECKIN' MY ALTIMETER, WHICH IS GONNA KEEP TRACK

OF OUR ELEVATION.

MATT, RIGHT NOW, WE'RE AT 12,260 FEET.

AFTER YOU, SIR.

ALL RIGHT.

WATCH MY SHADOW.

YOU GOT IT.

MATT AND I ARE FIGHTING TWO BATTLES HERE.

BESIDES COMING TO 12,000 FEET LIKE THIS,

THERE'S A LOT OF FACTORS PLAYING ON US

FROM A PHYSIOLOGICAL STANDPOINT.

AND WE'RE ALSO WALKIN' ON SALT.

I MEAN, IT'S LITERALLY THE WORST PLACE

YOU COULD BE FOR DEHYDRATION.

SO WE'RE GONNA HAVE TO SLOW OUR PACE DOWN A LITTLE BIT

'CAUSE EVEN THAT LITTLE BIT OF RESPIRATION FROM YOUR BREATHING

AND TALKING IS PRECIOUS WATER YOU CANNOT LOSE.

EVERY LITTLE BIT OF MOISTURE THAT YOU CAN SAVE IS JUST

MORE TIME ON YOUR SIDE TO GET FROM POINT A TO POINT B.

SEE THAT?

THOSE ARE DEFINITELY MOUNTAINS OUT THERE.

SEE HOW -- THAT LOW POINT?

IT LOOKS LIKE THERE'S A LITTLE PATCH OF LAND.

THAT'S WAY TOO DARK TO BE A MIRAGE, DUDE.

DEFINITELY.

Narrator: MIRAGES ARE CREATED WHEN HEAT RISES FROM A SURFACE

AND MIXES WITH COOLER AIR,

WHICH CAUSES LIGHT TO BEND AND CREATES A FALSE IMAGE

THAT IS OFTEN INTERPRETED AS A POOL OF WATER.

OVER DISTANCE, MIRAGES INTENSIFY.

SO THE LACK OF DISTORTION INDICATES A CLOSER LANDMASS.

I SAY WE SHOULD GO FOR THAT.

YEAH. YEAH. LET'S HEAD TOWARDS IT.

FROM THIS DISTANCE, WE CAN'T TELL ANYTHING

EXCEPT THERE IS SOME TYPE OF ROCK FORMATION

NOT TOO FAR AHEAD OF US.

MATT, I'M SEEIN' SOME GREEN UP THERE, DUDE.

YEAH. ACTUALLY, IT LOOKS LIKE THERE'S CACTUS...

OH, YEAH.

WHICH WOULD BE AWESOME.

THERE'S A LITTLE PATCH OF CACTUS OVER HERE.

WHERE?

LET'S CHECK THIS OUT.

UP HERE.

I DO NOTICE, DOWN LOWER, THERE'S A LITTLE

FORM OF A JOINTED CACTUS CALLED A ESPINILLO.

AND I KNOW THAT WE CAN GET AT LEAST A LITTLE BIT

OF MOISTURE OUT OF THIS.

HERE WE GO. ESPINILLO CACTUS.

THIS ONE ACTUALLY HAS A LITTLE FRUIT ON IT,

SO WE COULD GET SOME NUTRITION OUT OF THAT.

AND THEN WE COULD PROBABLY SQUEEZE SOME MOISTURE OUT OF IT.

ALL RIGHT, DUDE. I'M DOWN FOR IT.

I'LL TELL YA ANOTHER THING I WANNA DO, TOO, MATT,

WHILE WE'RE HERE -- LET ME JUST WALK AROUND

THE BASE OF THESE ROCKS REAL QUICK,

AND I'LL JUST SEE IF I CAN FIND ANY KINDA SEEPS OR ANYTHING

RIGHT OVER HERE, I'LL BE BACK IN A SECOND.

OKAY. I'LL SEE YOU IN A BIT.

Narrator: AS JOE SCOUTS FOR ANY SIGN OF GROUNDWATER,

MATT WORKS TO PROCESS CACTUS FOR A QUICK WAY TO REHYDRATE.

THIS ONE'S NICE, RIGHT HERE.

WHAT I'M LOOKIN' AT IS GETTING SOME MOISTURE OUT OF THE PAD.

SO I'M GONNA BASICALLY TAKE ALL THESE SPINES OFF, FLESH IT OUT,

AND SQUEEZE THAT OUT.

THERE'S THE STIFFER SPINES, AND THOSE ARE HARD TO GET OFF.

YOU EITHER HAVE TO CUT 'EM OFF OR GRIND 'EM OFF WITH A ROCK.

SO WE SEE AS I CUT INTO IT,

THAT'S ALL THE GOOD FLESH RIGHT IN THERE.

AND WITHIN ALL THAT MUCILAGINOUS FLESH, THERE IS SOME MOISTURE.

SO I'M GONNA TRY TO GET AS MUCH MOISTURE OUT OF THIS AS I CAN

BY SQUEEZING IT, SEPARATING THE MUCILAGE AND THE WATER.

IT'S DEFINITELY NO SUBSTITUTE FOR FRESH WATER,

BUT IT'S GONNA DO FOR NOW.

NOTHIN'? -NOT A DROP, DUDE.

CUT ME A LITTLE PIECE OF THAT OFF, MATT.

YEAH, YOU GOT IT.

HERE.

THANKS, MATT.

I'M GONNA CHEW IT LIKE TOBACCO A LITTLE BIT.

Matt: IT'D BE TEMPTING TO TAKE A CACTUS LIKE THIS

AND JUST START EATING IT, BUT I'M TRYING TO SEPARATE

THE WATER IN MY MOUTH.

I DON'T WANNA CHEW ANY FIBER, AND I DON'T WANNA SWALLOW IT.

MATT, WHILE YOU WORK ON THIS, I'M GONNA HEAD UP

ON TOP OF THIS ROCK AND SCAN WITH THAT DAMN TELESCOPE.

I'LL JUST BE RIGHT ABOVE YA.

OKAY.

Joe: WE NEED ACTIONABLE INTELLIGENCE.

THAT MEANS YOU'VE GOT TO PICK A DIRECTION AND KNOW

WHY YOU'RE GOIN' THAT DIRECTION.

YOU CANNOT AFFORD TO VEER. YOU CAN'T -- NOTHING.

THIS IS A GREAT VANTAGE POINT RIGHT HERE.

THE FIRST THING I'M SEEING FROM THE GET-GO

IS WHAT APPEARS TO BE THE EDGE OF THE SALT PAN

WAY, WAY IN THE DISTANCE.

I MEAN, THAT'S PROBABLY 15, 20 MILES FROM HERE.

WHAT I DON'T SEE ARE ANY TYPE OF STRUCTURES.

THERE'S DEFINITELY VERY PROMINENT TERRAIN FEATURES.

ONCE MATT AND I DROP BACK DOWN ONTO THE SALT PAN,

A LOT OF THAT STUFF'S GONNA DISAPPEAR,

SO I'M GONNA MAKE A REAL QUICK FIELD SKETCH.

I'M AT ELEVATION, LOOKING OUT.

SO WHAT I'M GONNA DO IS DRAW WHAT I'M SEEING --

A SNOWCAPPED MOUNTAIN.

I SEE ANOTHER MOUNTAIN TO THE RIGHT OF IT.

LOOKS LIKE THERE'S A VALLEY THAT COMES THROUGH IT.

THERE'S A PLATEAU.

THAT WAY, AS WE'RE WALKING, I CAN REFERENCE THAT MAP

THAT I MADE, AND I'LL BE ABLE TO TELL

IF WE'RE DRIFTING LEFT OR RIGHT.

HEY, MATT!

YEAH. WHAT'S UP?

I SEE THE EDGE OF THE SALT PAN,

BUT, DUDE, IT'S AT LEAST 15, 20 MILES OUT.

THAT WOULD BE A BIT OF A PUSH.

I AGREE.

WELL, I AM GETTIN' A LITTLE BIT OF MOISTURE OUT OF THIS CACTUS.

BE BETTER HERE THAN BEING STUCK OUT ON THE PAN.

THERE'S PLENTY OF TINDER DOWN HERE, AND I'M SEEIN' ENOUGH

STICKS AND THINGS WE COULD BURN.

I'M GONNA SCOPE FOR A LITTLE BIT LONGER, SEE IF I GET LUCKY.

I'LL COME DOWN IN ABOUT 10, 15 MINUTES.

ALL RIGHT. SOUNDS GOOD.

COOL.

Matt: FOR SOMEBODY IN A SITUATION LIKE THIS,

THEIR ENERGY, THEIR RESOURCES ARE DEPLETED.

IF THEY ARE LOW ON ENERGY, NOT ABLE TO WALK ANY FURTHER,

THEY'LL BE FULLY EXPOSED IN THE SALT PAN.

SO THEY SHOULD CAMP HERE FOR THE NIGHT, MAKE SHELTER,

START A FIRE, AND THEN GET AN EARLY START IN THE MORNING

WHEN IT'S COOL.

OH, THERE'S A NICE PIECE UP THERE.

THIS ROCK'S A LOT LOOSER THAN IT LOOKS.

THIS STUFF IS REALLY LOOSE. IT'S REALLY DECEPTIVE.

AS I'M CLIMBIN' IT, I'M PEELIN' APART ALL KINDS

OF BITS AND PIECES OF IT.

I JUST PUSH THIS BOULDER, AND IT DISLODGES.

[ BLEEP ]

Narrator: IN THE BOLIVIAN ANDES,

MATT AND JOE TAKE ON THE ROLE OF STARGAZERS

STRANDED ON A SALT FLAT THAT SITS AT 12,000 FEET

ABOVE SEA LEVEL.

THERE ARE NO RESOURCES. THERE'S NOT EVEN ROCKS HERE.

SEE THAT? THERE'S A LITTLE PATCH OF LAND.

Narrator: WHERE AN ISLAND OASIS OFFERS LITTLE

TO STAVE OFF DEHYDRATION.

Joe: THERE ARE CACTUS HERE AND SOME SMALL BRUSH,

BUT I'M NOT SEEIN' WATER.

Narrator: THEY ARE SCOURING THE ROCKS

FOR ANY RESOURCES THEY CAN FIND.

[ BLEEP ]

MATT, YOU OKAY?

MATT!

I RUN DOWN TO SEE IF MATT'S OKAY...

WHAT THE HELL WAS THAT? MATT!

YEAH. YEAH, I'M FINE.

SORRY ABOUT THAT. I WAS JUST CLEARIN' SOME ROCK.

IT'S ALL LOOSE ON THIS WHOLE SHELF,

BUT I FOUND SOME GOOD WOOD UP HERE.

BRO, GIVE ME A HEADS-UP THE NEXT TIME YOU DO THAT, MAN.

IT SOUNDED LIKE HALF THE FREAKIN' MOUNTAIN GAVE WAY.

YOU KNOW, FOR A MINUTE, I THOUGHT I WAS A ONE-MAN BAND.

AND, UH, YOU KNOW, THANK GOD HE'S OKAY.

HEY, I'M GONNA GRAB MY STUFF.

IF I SEE ANY WOOD, I'LL BRING IT DOWN WITH ME.

OKAY.

OH... OH, PERFECT TIMIN'.

THIS IS ABOUT ALL THE WOOD I COULD FIND UP THERE, MAN.

IT BURNS HOT AS HELL, BUT IT'S NOT GONNA LAST LONG.

I FOUND SOME CACTUS FOR YOU UP THERE. I GOT THREE OF 'EM.

OH, COOL. WE SHOULD DRINK THIS 'CAUSE THESE ROCKS

ARE A LITTLE BIT POROUS.

OKAY.

MATT SQUEEZED SOME OF THESE CACTUS INTO A JUICE.

AND, I MEAN, I'LL TELL YOU WHAT,

IT LOOKS LIKE SNOT AND WATER MIXED TOGETHER,

BUT YOU GOTTA DO WHAT YOU GOTTA DO IN A SITUATION LIKE THIS,

AND WE'RE SIPPIN' ON IT.

BETTER THAN NOTHIN'. WHAT ABOUT SHELTER, MAN?

THERE'S ACTUALLY A NICE CAVE NOT FAR,

JUST AROUND THE CORNER THERE.

YOU WANNA HEAD THERE?

YEAH.

Narrator: DESERT CLIMATES ARE KNOWN TO FLUCTUATE.

BUT THE EXTREME ALTITUDE OF THE ANDES MOUNTAINS

WIDENS THE GAP BETWEEN SUMMER-LIKE DAYS

AND WINTRY NIGHTTIME TEMPERATURES

THAT DROP BELOW FREEZING.

SO JOE AND MATT SHIFT THEIR FOCUS TO SECURING

SHELTER AND FIRE.

OH, YEAH. PERFECT.

WE GOT THIS NICE CAVE.

WE'RE GONNA DO A NICE WALL FOR A FIRE REFLECTOR

AND RADIATE THAT HEAT BACK IN THE CAVE.

AND THIS IS GONNA BE REALLY IDEAL.

YEAH. YOU KNOW WHAT?

THESE ROCKS WOULD ACTUALLY BE PRETTY GOOD FOR HEATING UP.

WE COULD PROBABLY DO A LITTLE HOT-ROCK BED IN HERE.

OH, THAT'D BE NICE TOO.

YEAH, THESE WON'T FRACTURE.

WELL, MATT, LET ME GET TO WORK ON A FIRE, MAN.

OKAY.

SEE IF I CAN PULL THIS ONE OFF.

MATT'S GONNA MAKE THE SHELTER, AND I'M GONNA TRY

TO MAKE A FIRE.

Matt: THIS IS GONNA BE REALLY SOLID HERE.

I'M GONNA MAKE A NICE HOT-ROCK BED BACK HERE,

A NICE ROCK WALL RIGHT HERE.

WHEN YOU'RE WALKIN' OUT ON THE SALT FLATS, IT'S EASY

TO GET A FALSE SENSE OF SECURITY BECAUSE, BASICALLY,

IT'S -- IT'S BLAZIN' OUT THERE.

AND IT'S -- IT'S HARD TO IMAGINE THAT THE TEMPERATURES

ARE ACTUALLY GONNA DROP DOWN TO 20 OR BELOW AT NIGHTTIME.

THESE NICE, POROUS ROCKS ARE ACTUALLY REALLY NICE

BECAUSE THEY'RE DRY.

THE POROUS NATURE MEANS THAT WHEN YOU HEAT 'EM UP,

THEY'RE NOT GONNA FRACTURE AND SHOOT OFF.

WHEN BUILDING A HOT-ROCK BED, YOU DON'T WANT ANY ROCKS

THAT ARE WATERLOGGED OR HAVE A REALLY HIGH SILICA CONTENT

LIKE QUARTZ 'CAUSE IF YOU BURN A ROCK LIKE THAT IN A FIRE,

IT'S GONNA SHOOT OFF LITTLE, TINY DISCS AT HIGH SPEED,

HIGH ENOUGH TO TAKE OUT YOUR EYE.

ALL RIGHT. THIS IS LOOKIN' GREAT.

SO WE GOT A NICE PIT HERE.

I'M GONNA FILL THIS WITH THESE ROCKS HERE.

SO WHEN WE HEAT UP ALL THOSE ROCKS,

I'M GONNA RAKE ALL THE COALS OVER TO THE SIDE,

PUSH IT AGAINST THE ROCK WALL.

SO WE'LL HAVE OUR FIRE HERE, PLUS WARM, HOT GROUND.

IT'S GONNA BE REALLY NICE.

SO WHAT I'M DOIN' IS JUST MAKIN' A -- A BIG NEST.

THIS STUFF'S NOT GONNA BURN REAL WELL.

WHAT I'M GONNA TRY TO DO IS CATCH A REALLY FINE BEAM

ON THIS STUFF FROM THE SUN USING THIS TELESCOPE.

I PUT THE REAL DRY STUFF IN THE CENTER,

AND THAT'S WHAT I'M GONNA TRY TO IGNITE WITH THE BEAM.

ONCE IT STARTS BURNIN', I'M JUST GONNA SET IT ON THIS ROCK.

IT'LL HELP CONTAIN THE FIRE,

'CAUSE I ONLY GOT 50 METERS TO GET BACK TO MATT, SO...

I THINK I CAN PULL IT OFF.

THE PROBLEM IS THE SUN IS GETTING VERY LOW IN THE SKY.

THE TRICK IS, I'VE GOTTA KEEP THAT BEAM ON ONE SPOT.

STARTIN' A FIRE WITH A LENS LIKE THIS IS REALLY PAINSTAKING.

THIS MIGHT NOT WORK, BUT I JUST HAVE TO FOCUS ON WHAT I'M DOING.

THERE WE GO. OKAY. OH, YEAH.

THERE WE GO.

AHH!

I'M TAKIN' THE FIRE OVER TO MATT, AND I'LL COME

COLLECT THIS STUFF UP IN A MINUTE.

AH. GRAB THE SIDES.

GOT IT?

YEAH. AWESOME.

SO I'M JUST GETTIN' THE FIRE TOGETHER RIGHT NOW.

ONCE WE GET THESE ROCKS HEATED UP, WE'LL SCOOP THIS OVER HERE.

THEN WE CAN LAY BACK IN THERE SAFELY.

OH, YEAH. DUDE, THIS IS NICE.

PUT YOUR HAND RIGHT IN THAT SPOT DOWN THERE.

OH, YEAH. I DREW A MAP UP THERE,

VERY SIMPLE TERRAIN FEATURES, 'CAUSE I KNOW

ONCE WE'RE DOWN HERE, THAT'S ALL GONNA DISAPPEAR.

BUT AS WE GET CLOSER...

RIGHT.

WE CAN JUST USE IT AS A NAVIGATION AID.

YOU KNOW, IT'S JUST BETTER THAN NOTHIN'.

YEAH. SOUNDS LIKE A GREAT PLAN.

I AGREE.

OH, YEAH. HOT BOOTY.

YEAH.

[ LAUGHS ]

Narrator: AS THE SUN RISES, JOE AND MATT HEAD EAST

ACROSS THE DESOLATE SALT FLAT.

EXPOSED TO THE SUN, ARID CLIMATE AND EXTREME ALTITUDE,

THEIR PRIORITY IS GETTING TO THE EDGE OF THE CAUSTIC GROUND

AND FINDING A MEANS FOR REHYDRATION.

Joe: WE'RE GONNA USE THAT MAP I HAVE,

AND HOPEFULLY WE'LL REACH THE END OF THAT SALT PAN.

THAT MOUNTAIN I'M DIGGIN', WITH THE SNOW ON THE TOP?

YEAH. I'M SEEIN' IT.

THERE'S A GOOD CHANCE WE'D FIND WATER AT THE BASE OF THAT.

IT'S GETTIN' A LITTLE SLUSHY RIGHT NOW.

YEAH. IT LOOKS LIKE WE'RE ALMOST THERE, THOUGH.

Joe: YEAH.

THAT WAS A DOOZY.

YEAH.

LOOKS LIKE WE DO HAVE VEGETATION UP AHEAD, THOUGH.

YEAH. I SEE SOME GREEN OUT THERE, MATT, TOO.

THAT MOUNTAIN'S NOT TOO FAR, EITHER.

WHEN YOU'RE STUCK IN THE MIDDLE OF SOMETHING LIKE THIS,

AND THEN YOU -- YOU FINALLY BREAK FREE TO THE OTHER SIDE,

YOU SEE DIRT AGAIN, YOU SEE SOIL, IT'S A HUGE RELIEF.

AND SOON AS WE STEPPED ONTO THE DIRT,

THE SUN WAS REFLECTING LESS, IT COOLED DOWN,

AND IT FELT A LOT EASIER WALKIN'.

WE GOT A WAYS TO GO, BRO.

THERE'S NOT A WHOLE LOT OF RESOURCES OUT HERE AT ALL.

MATT AND I JUST WALKED FROM A BARREN, WHITE WASTELAND

TO DESERT, SO IT DIDN'T GET MUCH BETTER.

WATER IS PRIORITY NUMBER ONE. DEHYDRATION IS THE KILLER HERE.

HEY, GOT SOME WATER DOWN THERE.

OH, DUDE, THAT'S A SIGHT FOR SORE EYES.

THIS IS THE FIRST SIGN OF WATER SINCE WE'VE BEEN HERE.

[BLEEP] WOW.

DUDE, IS IT WATER?

THAT IS MURKY.

Matt: WELL, IT'S PRETTY, UH...

DAMN, THAT IS REALLY RED, DUDE.

LET'S CHECK IT OUT.

IT COULD JUST BE A LITTLE BIT OF SILT STIRRED UP.

DUDE, IT LOOKS LIKE A GIANT BLOODY MARY.

YEAH, I'M NOT LIKIN' THE LOOKS OF THIS.

THERE'S TONS OF ALUM AROUND THE SOIL, AND IT'S ALL BUBBLED UP.

IT DOESN'T LOOK LIKE JUST SALT TO ME.

DAMN.

THERE'S DEFINITELY IRON IN THERE,

BUT A WHOLE LOT OF SOMETHIN' ELSE.

BUT IT LOOKS LIKE THERE'S A LOT OF MINERALS IN THIS WATER.

THIS COULD BE A -- BASICALLY AN ARSENIC POND.

[ SPITS, BLEEP ]

[ SPITTING ]

IT'S PRETTY BITTER?

IT AIN'T BITTER. IT ACTUALLY BURNS.

Narrator: IN THE VAST ANDES MOUNTAINS OF BOLIVIA,

JOE AND MATT ARE PLAYING OUT THE SCENARIO

OF TWO STRANDED ASTRONOMERS.

DAMN, THAT IS REALLY RED, DUDE.

IN THE HIGH DESERT, LIFE-SUSTAINING RESOURCES

ARE SCARCE AND SHOULD BE APPROACHED WITH CAUTION.

[ SNIFFS ]

[ SPITS, BLEEP ]

[ SPITTING ]

IT'S PRETTY BITTER?

IT AIN'T BITTER. IT ACTUALLY BURNS.

THERE'S NO WAY IN HELL WE CAN DRINK THAT, MATT.

DUDE, IS THERE ANY WAY WE CAN PROCESS THIS STUFF

AND BOIL THE [BLEEP] OUT OF IT?

'CAUSE I'D HATE TO WALK AWAY FROM THIS RIGHT NOW.

WELL, THERE'S A LOT OF ALUM, WHICH HAS A LOT OF

HEAVY MINERALS, SO ALUMINUM.

IT'S -- BASICALLY IT'S CAUSTIC FROM --

FROM SOME TYPE OF MINERAL IN THE GROUND.

SO BOILING IT'S NOT GONNA CHANGE THE CONSTITUTION.

DAMN.

Matt: WHEN YOU COME ACROSS A BODY OF WATER, NO MATTER WHAT,

PEOPLE ARE TEMPTED TO DRINK IT DOWN.

BUT ON THE VERY LEAST, IT'S VERY ALKALINE,

PROBABLY VERY SALTY, BECAUSE IT'S DRYING OUT

BOTH OUR SKIN AND HIS TONGUE.

I THINK IT'S SAFE TO SAY THAT WE GOTTA HIKE

OUTTA HERE AND FIND SOME WATER.

YEAH. ALL RIGHT, DUDE. LET'S JUST KEEP GOIN'.

I SWEAR, IT FEELS LIKE I JUST LICKED A HUNDRED ENVELOPES.

[ LAUGHS ] YEAH, I GUESS THAT'S ONE WAY TO PUT IT.

GOD BLESS.

WELL, WE'RE CLIMBIN' UP IN ELEVATION.

HOPEFULLY WE'LL FIND SOMETHIN' SOONER THAN LATER.

BRO, WE'RE RIGHT AT 13,000.

OKAY.

RIGHT BELOW IT.

GOD, THAT MOUNTAIN'S GOTTA BE ABOUT 17.

THAT'S THE ONE I DREW ON THE MAP.

RIGHT. THAT WOULD BE A GOOD PLACE TO FIND WATER, MAN.

IT'S A LONG WAYS.

Joe: AS YOU INCREASE IN ALTITUDE,

YOU'RE GONNA DEHYDRATE EVEN MORE.

IF YOU DON'T FIND WATER SOON IN AN ENVIRONMENT LIKE THIS,

YOU'RE JUST NOT GONNA BE ABLE TO FUNCTION.

HEY, CHECK THIS OUT.

LOOK AT ALL THESE TRAILS MERGING RIGHT THERE.

WOW.

THEY'RE HOOFED ANIMALS, THAT'S FOR SURE.

CERTAIN ANIMALS CAN GO FOREVER JUST GETTING WATER FROM PLANTS.

BUT WHEN YOU START SEEIN' SOME HOOF TRACKS OF BIG GAME,

THEY NEED WATER AT LEAST EVERY OTHER DAY.

SO THERE'S A GOOD CHANCE THAT THERE'S SOME AROUND.

THAT'S DEFINITELY A LOT OF ANIMAL ACTIVITY.

AND IT DROPS OVER THAT RIDGE.

I THINK THAT'S WORTH CHECKIN' OUT.

I MEAN, MY EXPERIENCE IN THE DESERT,

WHEN YOU SEE THAT, I MEAN, WATER'S A HIGH COMMODITY.

RIGHT.

SO...

RIGHT NOW, WE'RE KIND OF AT A CROSSROADS.

WE GOTTA WEIGH THE RISK, REWARD. IT MAY LEAD TO SOMETHING.

IT MAY NOT.

THIS IS THE FIRST SIGN OF ANY KINDA ANIMAL LIFE.

I MEAN, I'M DOWN WITH IT IF YOU WANNA TRY IT OUT.

LET'S FOLLOW IT FOR AT LEAST A QUARTER MILE.

ALL RIGHT. I THINK IT'S WORTH IT, ABSOLUTELY.

Narrator: IN THE BOLIVIAN ANDES, TRAVELERS ENCOUNTER

EVERYTHING THAT ACCELERATES DEHYDRATION --

NAMELY, AN ARID CLIMATE, HIGH ALTITUDE,

SUN EXPOSURE, AND WIND.

WITH ALL OF THESE FACTORS AT PLAY,

THE BODY CAN LOSE A QUART OF WATER AN HOUR.

CHECK IT OUT. THERE'S DEFINITELY WATER THERE.

OH, MAN.

AND A LITTLE BIT OF A MARSH.

DUDE, IT'S NOT RED, IS IT?

IT'S A LITTLE DISCOLORED,

BUT THERE'S SOME PLANTS GROWIN' IN IT.

THAT'S A GOOD SIGN.

YEAH, IT IS.

IT DOESN'T LOOK LIKE IT'S AS TOXIC AS THE LAST BODY OF WATER.

THERE'S A LOT OF PLANT LIFE AROUND IT. THERE'S BULRUSH.

AND I DON'T SEE ANY WHITE ALUM AROUND THE EDGES.

SO ALL THIS INDICATES THIS IS POTENTIALLY DRINKABLE WATER.

[ SNIFFS ]

THAT'S NOT SALTWATER. -YEAH.

THERE'S NO WAY. THAT'S NOT SALTWATER.

OH, MY GOD. THIS IS AMAZING.

HMM.

WHAT DO YOU THINK, MATT?

I MEAN, WE HAVE NO WAY TO BOIL IT.

Matt: YOU HAVE TO WEIGH THE RISK HERE.

BASICALLY, YOU'RE FACING POTENTIALLY GETTING SICK

FROM THIS WATER.

BUT IF IT'S PARASITIC, YOU PROBABLY HAVE ABOUT A WEEK

BEFORE THAT SETS IN.

SO IN A SITUATION LIKE THIS,

A PERSON MIGHT WANT TO TAKE THAT CHANCE.

I THINK IT'S AS GOOD AS ANY.

Joe: MATT LIVES IN AN ENVIRONMENT

VERY SIMILAR TO THIS, SO THIS GUY IS IN TUNE

WITH WHAT HE IS SEEING, WHAT HE'S SMELLING,

WHAT HE'S TASTING.

I MEAN, SO GOING AGAINST MY SURVIVAL PROTOCOL,

I'M GOING TO DRINK IT.

I'LL TAKE IT.

YEAH.

THAT'S GOOD WATER.

[ SLURPING ]

WE CAN DRINK WATER TILL IT'S COMING OUT OF OUR EARS

RIGHT NOW, SO FOR SOMEONE IN THIS SITUATION,

IT'S A NO-BRAINER TO JUST STOP, CALL IT A DAY AND REHYDRATE.

I THINK IT'S BETTER FOR US TO STAY HERE,

KEEP HYDRATING AND THEN KEEP GOIN'.

YEAH, I THINK THAT'S A GOOD IDEA.

WHY DON'T I GO GRAB SOME FIREWOOD?

GET A FIRE GOIN'.

SOUNDS GOOD.

THIS SPOT RIGHT HERE IS REALLY NICE

BECAUSE IT'S PROTECTED FROM THE WIND.

IT'S NOT TOO FAR ON THE RIDGELINE,

BUT IT'S JUST -- IT'S JUST ABOVE THE WATER.

AND IT'S NOT IN THAT SPOT WHERE THE COLD AIR SETTLES.

I'M GONNA GO AHEAD AND DIG DOWN A LITTLE BIT FURTHER

AND CREATE BASICALLY A LITTLE BIT OF A CIRCLE TRENCH.

I THINK I MIGHT GRAB SOME BUSHES

AND KINDA SURROUND THIS AREA IN,

AND WE'LL CREATE A CENTRAL FIRE HERE,

BASICALLY HARNESS ALL THE HEAT.

PAIUTE PEOPLE BUILD BIG, ALMOST BROMAS AROUND

TO PROTECT THEMSELVES FROM THE WIND AND HAVE A CENTRAL FIRE.

SO WE'RE DOING, LIKE, A LITTLE MINI VERSION OF THAT.

ALL RIGHT. THAT -- THAT LOOKS GREAT.

WE GOT A NICE, NATURAL WINDBREAK.

GET A LITTLE FIRE IN THERE, SOME INSULATED BEDS,

AND WE'LL BE ABLE TO CONTAIN THAT HEAT.

SO NOW I JUST GOTTA GET SOME BULRUSH AND LAY IT DOWN.

THIS TOLA BUSH IS EVERYWHERE.

BUT IT BURNS SO FREAKIN' FAST, IT DOESN'T LAST LONG.

SO HOPEFULLY I CAN FIND SOME OTHER FUEL SOURCE OUT HERE,

OR WOOD, THAT CAN BURN LONGER.

HA HA.

WE HAVE A REALLY NICE PILE OF LLAMA PELLETS RIGHT HERE.

THIS STUFF'S DRY AS A BONE. IT CATCHES A SPARK REAL WELL.

THESE ARE LIKE LITTLE, MINI-FUEL TABLETS.

I JUST NEED TO SCOOP THIS STUFF UP.

THINKIN' ABOUT MAYBE USING THE PONCHO THAT I HAVE.

ANIMAL CRAP IS NOT AN ACCELERANT.

IT'S AN EXTENDER. IT BURNS, BUT IT BURNS FOR A LONG TIME,

AND THAT'S WHAT I NEED.

I CAN MIX THAT WITH THIS TOLA BUSH.

THAT'LL MAKE A REALLY NICE FIRE.

[ HACKING ]

WHAT'S GOIN' ON, BRO?

OH, JUST GETTIN' SOME MORE TOLA FOR THE SHELTER.

OH, I'M LIKIN' THAT, DUDE.

HAVE YOU BEEN SEEING THESE HOLES?

YEP, I HAVE.

ANY IDEA WHAT THEY MIGHT BE?

I'M NOT SURE. SOME TYPE OF LITTLE GOPHER.

DOESN'T SEEM LIKE A -- A BIG RODENT,

BUT THERE'S A LOT OF 'EM.

AND IF WE COULD GET SOME PROTEIN...

BEAUTIFUL. THAT'D BE NICE.

I'M GONNA DROP THIS STUFF OFF. HAPPY HUNTIN', MAN.

OKAY. COOL.

Matt: I'M SEEING TRACKS EVERYWHERE,

AND I'M SEEIN' LITTLE HOLES.

AND I'M THINKIN', AS THE SUN STARTS DROPPIN' DOWN,

THEY MIGHT START MOVIN' AROUND.

OUT IN THIS ENVIRONMENT, THERE'S NO STICKS OR ANYTHING

TO MAKE A BOW OR ATLATL -- ALL THAT'S OUT OF THE QUESTION.

SO, LOOKIN' AT THE GEAR WE HAVE,

I'M THINKIN' A SLING MIGHT BE A NICE BET.

SO I'VE GOT A LITTLE BIT OF LEATHER ON THIS POUCH.

WHAT I'M THINKING IS -- IS USING THAT

FOR THE POUCH OF THE SLING.

AND THE SLING USES THE MECHANICS OF YOU SWINGING IT AROUND

TO DELIVER THE VELOCITY.

WITH THE SLING, YOU'RE CREATING THIS EXTENSION ON YOUR ARM,

MUCH LIKE YOU DO AN ATLATL, SO THAT WHEN YOU THROW A ROCK

FROM A SLING, IT CAN TRAVEL OVER 200 MILES AN HOUR.

SO RIGHT THERE, THAT'S A NICE PIECE OF LEATHER.

WHAT I WANNA DO IS I WANNA TAPER THE ENDS OUT.

BASICALLY, YOU MAKE A FOLD IN THE POUCH.

I POKED TWO HOLES RIGHT THERE.

SO I'M GONNA RUN THE CORD THROUGH BOTH HOLES.

AND, BASICALLY, I'M GONNA TIE THE CORD LOOSELY AROUND HERE.

I DON'T WANNA PINCH IT ALL THE WAY.

YOU WANT THE POUCH TO HOLD THE ROCK,

BUT YOU DON'T WANT IT TO HOLD ON TOO TIGHT.

BASICALLY, YOU'VE GOT TWO STRINGS.

ONE STRING STAYS ATTACHED TO YOUR BODY.

SO THAT ONE HAS A LOOP, WHICH I PUT THROUGH MY MIDDLE FINGER.

THEN THE OTHER ONE, I JUST PINCH A KNOT.

AND WHEN I MAKE THE THROW, RIGHT WHEN IT COMES OVERHEAD,

JUST BEFORE IT COMES DOWN, I RELEASE THAT KNOT

IN ORDER TO GET THAT ROCK TO SAIL IN THE RIGHT SPOT.

[ WHOOSHES ]

THAT'S THE TICKET RIGHT THERE.

CAN SEE THERE'S A LOT OF ACTIVITY RIGHT IN HERE,

ALL THE HOLES.

THERE SEEMS TO BE AN AREA THAT'S MORE DISTURBED

THAN OTHERS.

SO I'M BASICALLY USING ALL THE BRUSH TO MY ADVANTAGE,

MOVING IN REALLY SLOW, WAITING TO SEE IF ANY POP OUT.

[ Whispers ] THERE'S ONE THERE. I'M GONNA CIRCLE AROUND.

[ WHOOSHES ]

Narrator: "DUAL SURVIVAL'S ART OF SELF-RELIANCE."

NAVIGATING A TERRAIN LIKE THIS IS VERY CHALLENGING.

AND LET ME SHOW YOU ONE WAY YOU CAN DO IT.

IF YOU TAKE A LOOK AT RIGHT HERE AND YOU SEE THIS "X,"

I'M GONNA PICK ANOTHER ONE ABOUT 30 YARDS IN FRONT OF ME,

AND I'M GONNA WALK TO IT.

WHEN I GET TO THIS ONE, I'M GONNA DO THE SAME THING.

I'M GONNA PICK ANOTHER ONE DIRECTLY IN MY LINE OF TRAVEL,

AND I'M GONNA MOVE TO IT.

NAVIGATING IS A HUGE SKILL IN A SURVIVAL SITUATION.

PUT UNCONVENTIONAL SOLUTIONS TO CONVENTIONAL PROBLEMS,

YOU'LL GET OUT OF A PLACE LIKE THIS.

Narrator: IN THE HIGH-ALTITUDE DESERT OF BOLIVIA,

RESOURCES ARE SCARCE.

[ Whispers ] THERE'S ONE THERE. I'M GONNA CIRCLE AROUND.

Narrator: SO JOE AND MATT ARE MAKING THE MOST OF A SMALL OASIS

THAT OFFERS BOTH FRESH WATER AND POTENTIAL FOOD.

[ WHOOSHES ]

[ BLEEP ]

[ BLEEP ]

[ Normal voice ] THAT HOLE GOES WAY IN THERE.

I RAN AFTER IT, BUT IT DOVE INTO ONE OF THE HOLES.

I SCARED IT. IT SKIRTED AWAY.

IT'S GETTIN' PRETTY LATE.

THE LITTLE RODENTS LIVE FOR ANOTHER DAY.

BUT JOE AND MATT'S STOMACH -- NOT HAPPY.

HEY, MAN.

MAN, I'M GLAD TO SEE THAT FIRE.

NO LUCK ON THE HUNT, BUT I DID GRAB A COUPLE OF SHOOTS.

NICE.

YEAH.

THERE'S A BUNCH OF BULRUSH IN THE WATER,

AND IT'S GOT A NICE SHOOT.

YOU CAN EAT IT RAW OR ON THE FIRE.

WOW. THIS IS VERY REMINISCENT OF CATTAIL.

YEAH, VERY SIMILAR.

THE SHOOTS HAVE COMPLEX CARBOHYDRATES AND STARCHES.

WE'RE LACKIN' A LITTLE PROTEIN, BUT BETTER THAN NOTHING.

YOU KNOW, FROM WHERE WE STARTED, MATT, TO WHERE WE'RE AT

RIGHT NOW, I THINK WE'RE BATTING A THOUSAND,

TO BE HONEST WITH YA.

YEAH. NOT MUCH MORE WE COULD DO.

NO.

Narrator: AS THE SUN RISES OVER THE ANDES MOUNTAINS,

MATT AND JOE SET THEIR COURSE EAST IN SEARCH OF A WAY

TO MAKE CONTACT WITH CIVILIZATION.

[ EXHALING ]

I DON'T SEE ANYTHING, MATT.

THAT'S A LONG WAY TO CLIMB FOR A NICE VIEW, I GUESS.

I CAN SEE 360 DEGREES AROUND, AND I DON'T SEE JACK.

WE'VE GOTTA GET UP AND OVER THIS MOUNTAIN RANGE,

AND THAT'S WHERE PEOPLE AND WATER ARE GONNA BE.

WHAT ARE YOU THINKIN'? JUST DROP DOWN,

GET UP ON THAT GREEN AREA?

THAT LOOKS LIKE PRETTY EASY WALKIN'.

I MEAN, THERE'S A GOOD CHANCE THERE'S A DIFFERENT ECOSYSTEM

ON THE OTHER SIDE OF THAT RIDGELINE,

AND IT MIGHT BE A LOT GREENER THAN EVEN WHAT WE'RE SEEING.

RIGHT NOW, WE'RE FACED WITH A LARGE MOUNTAIN RANGE.

AND I BELIEVE IF WE CAN GET TO THE OTHER SIDE OF THIS,

WE SHOULD BE ABLE TO FIND WETTER TERRAIN, LUSHER ENVIRONMENT.

HOPEFULLY WE'LL FIND MORE RESOURCES.

REAL QUICK CHECK ON THE ALTITUDE --

14,010.

-AND CLIMBING. -AND CLIMBING.

LET'S KEEP GOIN'.

Joe: WE ARE NOT CHANGING GEARS RIGHT NOW.

WE'RE HEADIN' OUT. THAT'S IT. THERE'S NOTHING ELSE WE CAN DO.

WHAT ARE WE GONNA DO? TURN AROUND AND GO BACK?

TO WHAT?

AS JOE AND MATT GAIN ALTITUDE IN THE ANDES MOUNTAINS,

THE AIR THINS, VEGETATION IS UNABLE TO GROW

IN THE HARSH CLIMATE,

AND THE LANDSCAPE EVENTUALLY SHIFTS FROM SCRUBLAND

TO A ROCKY MOONSCAPE.

LOOKS LIKE WE GOT A FEW MORE LITTLE HUMPS TO GO THROUGH.

JOE AND I FINALLY CRESTED UP OVER THE SADDLE.

WE'RE LOOKIN' DOWN THE OTHER SIDE,

AND IT'S STILL SPARSE UP HERE.

MAN, THIS IS NOT WHAT I WAS EXPECTIN' TO SEE, DUDE.

I WAS EXPECTIN' TO SEE SOME TREES.

YEAH.

LOOKS LIKE WE GOTTA CREST THIS HUMP ONE MORE TIME.

[ EXHALES ]

THIS IS A LONG SADDLE.

WE'VE GOT FOG COMING UP FROM THE LOWLANDS.

THE GOOD NEWS, THAT FOG MEANS THAT THERE'S LUSHER LAND,

WETTER LAND, THAT'S DRIVING IT UP HERE.

THE BAD NEWS IS WE'RE STILL FULLY EXPOSED UP HERE

ON THIS MOUNTAIN.

WHAT'S THE HIGHEST ELEVATION YOU BEEN TO?

FOURTEEN SIX-SOMETHING.

WELL, YOU GOT THAT BEAT BY ALMOST 2,000 FEET, DUDE.

AND I FEEL IT.

MATT AND I ARE FIGHTING ELEVATION RIGHT NOW.

FOR SOMEONE IN A SITUATION LIKE THIS, YOU'RE GONNA BE DEALING

WITH A LOT OF ENVIRONMENTAL PRESSURES --

HIGH ALTITUDE, HIGH WINDS,

FREEZING-COLD TEMPERATURES, EXPOSURE.

YOU KNOW, WHAT COULD POSSIBLY GO WRONG?

SO, MATT, SHOULD WE KEEP GOING, OR SHELTER RIGHT NOW?

IT'S -- I DON'T... IT'S A TOUGH CALL.

I MEAN, CONSIDERING HOW FAR WE'VE GONE,

AND IT'S LOOKING PRETTY BLEAK AHEAD.

WE MIGHT AS WELL JUST TRY...

NO KIDDIN'.

TO FIND A PLACE OUT OF WIND AND MAKE A NEST.

MAN, THERE AIN'T A WHOLE LOT TO WORK WITH

UP THERE, IS THERE, MATT?

EVERYTHING SEEMS TO BE FACING THE WIND OVER HERE.

YEAH, WE NEED TO GET OFF THIS RIDGELINE A.S.A.P.

Narrator: THE EFFECTS OF THIS COLD AND EXPOSED ENVIRONMENT

ON THE BODY ARE COMPOUNDED BY AN ALTITUDE

OF MORE THAN 16,000 FEET.

AT THIS ELEVATION, THE AIR CONTAINS 55 PERCENT

OF THE OXYGEN FOUND AT SEA LEVEL.

SO THE BODY HAS TO WORK ROUGHLY TWICE AS HARD TO PERFORM

BASIC METABOLIC FUNCTIONS, LIKE MAINTAINING A CORE TEMPERATURE.

HERE, INSULATING AGAINST HEAT LOSS IS A NECESSITY.

I'M LIKIN' ALL THIS GRASS. THAT'LL BE GOOD FOR INSULATION.

YEAH, MAN.

THIS PLACE LOOKS LIKE THE FREAKIN' MOON.

THERE'S NOT A WHOLE LOTTA RESOURCES.

THE WIND'S HONKING. IT'S COLD AS HELL.

AND YOU'RE NOT GONNA LAST VERY LONG,

ESPECIALLY IN AN ENVIRONMENT LIKE THIS.

WELL, MAYBE RIGHT IN HERE.

IT'S KINDA LEDGY. IT'S A LITTLE BIT SLOPED.

KINDA SLOPEY, TOO, YEAH.

Matt: THIS IS NOT AN IDEAL PLACE FOR A SHELTER.

BUT AT THIS ELEVATION, THE AIR IS THIN.

THERE'S VERY LITTLE OXYGEN.

SO MOVIN' AROUND HERE IS VERY DIFFICULT.

THAT'S A NICE LITTLE OVERHANG RIGHT THERE, BUT, MAN.

YEAH, IT'S A LITTLE SLOPED.

YOU HAVE TO BE VERY METHODICAL ABOUT HOW YOU PLAN OUT

YOUR SURVIVAL IN A SPOT LIKE THIS.

YOU DON'T WANNA JUST KA-PLUNK RIGHT WHERE YOU'RE STANDING.

BUT BEING UP HERE, YOU CAN'T USE UP TOO MUCH ENERGY.

I DON'T KNOW. IT'S A GAMBLE.

IF IT DID RAIN UP HERE, WE'D BE SCREWED.

Narrator: AT THIS ELEVATION IN THE ANDES MOUNTAINS,

NIGHTTIME WILL BRING FREEZING TEMPERATURES.

WITHOUT A PROPER SHELTER, THE RISK OF HYPOTHERMIA

AND FROSTBITE WILL RISE DRAMATICALLY.

DUDE, I DON'T THINK IT WOULD RAIN.

IF ANYTHING, THE TEMPERATURE'S GONNA PLUMMET TONIGHT, DUDE.

IF ANYTHING, IT'LL SNOW, WHICH IS GONNA MAKE IT EVEN WORSE.

THIS IS A VERY, VERY UNFORGIVING AND DANGEROUS PLACE.

WE GOT FOG ROLLING IN, AND IT'S GONNA BE [BLEEP] COLD.

HUMAN BEINGS ARE NOT MEANT TO BE WHERE MATT AND I ARE RIGHT NOW.

THEY'RE JUST NOT.

IT SUCKS, BUT... IT'S KINDA ALL WE GOT.

MAN!

YOUR CALL, MAN. WHAT DO YOU THINK?

WHAT DO YOU GOT THERE, MAN?

THESE ARE THE ESPINILLO CACTUS FRUIT.

IT'S, UH -- IT'S GOT A LOT OF MOISTURE IN IT.

OOH, THAT'S BITTER. OH! [ BLEEP ]

YOU FIND THAT BITTER?

YOU SHOULD'VE TOLD ME THAT. MAN!

I THINK IT'S AWESOME. IT'S, LIKE --

TO ME, IT'S, LIKE, UM, WATERMELON.

LIKE, A LITTLE BIT CLOSE TO THE RIND,

MAYBE NOT QUITE THE RED PART.

BUT IT'S, LIKE, 80 PERCENT WATER.

IT MAKES YOUR GLANDS KINDA... [ CRUNCHES ]

I WONDER IF YOU --

DUDE, YOU MIGHT BE ALLERGIC TO IT

'CAUSE I -- I'M REALLY ENJOYIN' THIS.

BUT YOU PROBABLY EAT THIS ON YOUR CEREAL, FOR ALL I KNOW.

I DON'T EAT CEREAL.

OH?

BUT, YEAH, I PUT THIS ON MY -- MY FISH THAT I GATHER.

I JUST LIKE FOOD THAT TASTES GOOD.

BUT I'LL EAT IT.

IT'S BETTER THAN SCORPIONS, RIGHT?

[ BOTH LAUGH ]

YEAH.

Narrator: IN THE BOLIVIAN ANDES,

JOE AND MATT ARE TRAVELING EAST THROUGH A HIGH MOUNTAIN PASS...

WHAT'S THE HIGHEST ELEVATION YOU EVER BEEN TO?

FOURTEEN SIX-SOMETHING.

WELL, YOU GOT THAT BEAT BY ALMOST 2,000 FEET, DUDE.

...IN A SCENARIO WHERE FINDING WATER AND PROTECTION

FROM THE ELEMENTS TRUMP ALL OTHER SURVIVAL CONCERNS.

THAT'S A NICE LITTLE OVERHANG RIGHT THERE, BUT, MAN.

YEAH.

WE GOTTA FIND A PLACE OUT OF THE WIND,

GET INSULATED AND HUNKER DOWN.

IT SUCKS, BUT IT'S KINDA ALL WE GOT.

YOU KNOW WHAT WE COULD DO, ACTUALLY?

THERE'S A LOT OF BLOCKY ROCKS AROUND HERE.

YEP.

WE COULD BUILD A NICE WINDBREAK RIGHT HERE

AND USE THIS FLAT SECTION TO GO AHEAD AND BED IN,

AND USE ALL THE GRASS.

AND IF IT DOES SNOW, WE'RE THIS CLOSE.

WE JUST TUCK IN UP THERE.

I'M DIGGIN' IT.

I'M JUST GONNA GET AS MUCH GRASS AS I CAN

AND BUILD A LITTLE ROCK WALL HERE.

Joe: MATT AND I ARE SITTING, RIGHT NOW, AT ABOUT 16,000 FEET.

THE PLACE LOOKS LIKE THE FREAKIN' MOON.

AT ELEVATION, EVERYTHING'S COMPOUNDED.

YOUR HEART'S BEATING HARDER. YOU'RE BREATHING HEAVIER.

ALL OF THIS ADDS TO YOUR PROBLEM OF LOSING WATER.

WHY DON'T I SET UP MAYBE A FOG CATCHER?

OKAY.

AND SEE IF I CAN GET A LITTLE BIT OF WATER.

YEAH. NO, I THINK IT'S A GOOD IDEA.

ALL RIGHT, DUDE, I'M GONNA SET IT UP SOMEWHERE RIGHT HERE.

ALL RIGHT, COOL.

THIS SPOT WILL DO.

THIS FOG IS GONNA HELP MATT AND I COLLECT SOME MOISTURE.

AND WHAT I'M GONNA DO IS SET UP A FOG BARRIER.

THE WAY THIS THING WORKS IS VERY SIMPLE.

YOU NEED TWO POLES TO HOLD UP A PIECE OF MATERIAL

THAT WILL LET THE WIND BLOW THROUGH IT,

WHICH GIVES YOU SURFACE AREA FOR THAT MOISTURE TO COLLECT ON,

DRIP DOWN, AND YOU CATCH IT.

I MADE A FOG BARRIER WHEN I WAS IN THE MARINE CORPS IN A JUNGLE,

AND IT WORKED.

I GOT ABOUT A CANTEEN CUP FULL OF WATER OUT OF IT.

THE MOISTURE IN THE FOG WILL COLLECT ON THE FACE OF THIS.

IT'S GONNA DRIP DOWN AND COLLECT RIGHT HERE.

NOT A LOT OF WATER, BUT IN A SITUATION LIKE THIS,

IF WE JUST GET A MOUTHFUL APIECE, THAT'S GOOD ENOUGH.

Matt: UP IN AN ENVIRONMENT LIKE THIS,

I BASICALLY GOT ROCK, GRASS, AND CLOUDS.

CLOUDS, MAYBE IN ANOTHER LIFETIME, MAKE A GREAT SHELTER,

BUT I'VE GOTTA MAKE THE MOST DO WITH THESE TWO RESOURCES

AND MAKE A SHELTER THAT'S VERY EFFICIENT.

FIRST CONCERN IS YOU GOTTA GET OUTTA THE WIND.

THAT'LL SUCK THE HEAT RIGHT OUT OF YOU.

THERE'S NOT A LOT OF RESOURCES HERE.

WE GOT TONS OF FLAT ROCK, SO IT'S NICE.

WE'LL BE ABLE TO MAKE DO WITH THAT

AND MAKE A NICE COCOON AROUND US.

WHAT I'M LOOKING AT IS TAKING ROCKS AND MAKING

AN EXTRA WINDBREAK, AND THEN USING THE GRASS AS INSULATION,

CONTAINING THAT, WRAPPING IT AROUND AND CREATING

BASICALLY A BIG BIRD NEST.

AT THESE HIGHER ELEVATIONS, IF YOU CAN'T HAVE A FIRE

AND THERE'S NO WOOD TO BURN, INSULATION IS --

IS ABSOLUTELY CRITICAL.

BY BUILDING UP THE SIDEWALLS, BASICALLY WE'RE IN A CRADLE.

BUT WHEN YOU'RE UP IN A CONDITION LIKE THIS,

IT'S IMPORTANT TO STAY CLOSE AND CONSERVE --

CONTAIN THAT BODY HEAT ALL TOGETHER.

YOU LOOK LIKE A BIRD SITTIN' IN A NEST, DUDE.

YEAH. I'M GETTIN' COZY.

WHEW, MAN, IT IS GETTIN' COLD, BRO.

IT IS. HOP IN, BUDDY.

YEAH.

OH, DUDE.

WE GOT ABOUT A FOOT OF INSULATION HERE, AT LEAST.

Narrator: IN A HIGH-ALTITUDE SURVIVAL SCENARIO,

THE DANGERS OF DARKNESS AND EXTREME WEATHER

DICTATE HUNKERING DOWN.

BUT ONCE CONDITIONS CLEAR, THERE SHOULD BE TWO OBJECTIVES --

HYDRATION AND DESCENT TO LOWER ELEVATION.

LET'S SEE WHAT WE GOT, BRO.

EH...

OH, NICE.

WE GOT A LITTLE BIT.

ABSOLUTELY.

THAT'S DEFINITELY ENOUGH TO KEEP OUR MOUTHS WET FOR A WHILE.

YEAH. NO, I'M GLAD YOU DID THIS.

THIS IS PERFECT.

YEAH.

I BROKE ONE THE LAST LEG AND MADE IT INTO A STRAW.

OH, COOL.

GO AND HAVE SOME.

I'LL GET THIS BACKPACK READY, AND WE'LL ROLL THIS THING UP.

HOW'S IT TASTE, BRO?

AHH.

ARE YOU LIKIN' THAT?

PURE, DISTILLED RAINWATER.

WATER IN ANY SURVIVAL SITUATION IS IMPORTANT.

BUT AT ALTITUDE, IT'S EVEN MORE IMPORTANT.

[ SLURPING ]

AH!

THAT'S IT, HUH?

THAT'S THE END OF IT, BRO.

OUR GOAL, AT THIS POINT, IS BASICALLY TO KEEP DESCENDING,

GET DOWN TO LOWER ELEVATIONS WHERE, HOPEFULLY,

THERE'S MORE WATER, LUSHER TERRAIN,

AND THAT WILL BE WHERE PEOPLE CONGREGATE.

READY?

YEAH.

[ EXHALES ]

Joe: WE'VE GOT A LONG WAY TO GO.

WE'RE HEADING TOWARDS THE AMAZON BASIN,

AND HOPEFULLY WE'RE GONNA BUMP INTO SOMEBODY

OR SOME TYPE OF CIVILIZATION BEFORE WE GET THAT FAR.

HEY, WHAT'S -- WHAT'S YOUR ELEVATION HERE?

[ BEEPS ]

WE JUST CROSSED 13-THOUSAND-4.

WE'RE DROPPING PRETTY GOOD.

IT LOOKS LIKE THIS VALLEY WILL KEEP TAKIN' US DOWN.

ALL RIGHT, MAN. LET'S KEEP TRUCKIN'.

MATT AND I ARE STILL AT A VERY HIGH ELEVATION,

BUT WE'RE DROPPING SLOWLY.

WE'RE SEEING A LOT OF GREEN, YOU KNOW,

BUSHES THAT ARE STARTING TO COME UP OFF THE GROUND.

I'M SURE TREES ARE RIGHT AROUND THE CORNER,

SO THIS NEW TERRAIN IS JUST RE-EMPHASIZING

THAT WE'RE MAKING THE RIGHT DECISION.

THE LOWER WE'RE GONNA GO NOW, THE MORE PROMINENT

THESE RESOURCES ARE GONNA BECOME.

I'M REALLY SHOCKED HOW THE GREEN JUST WENT AWAY.

YEAH. PRETTY DESERT-Y OUT HERE.

THIS GOES TO SHOW YOU HOW DIVERSE TERRAIN CAN BE,

EVEN BEING SO CLOSE TOGETHER.

IT WAS STARTING TO GET THICKER AND MORE LUSH.

AND NOW WE'RE HEADING INTO EVEN MORE SPARSE VEGETATION

ALL OVER AGAIN.

HEY, LOOK AT THIS.

THERE'S A BIG HERD OF LLAMAS RIGHT UP THERE.

WHAT THE HELL?

THESE ARE DOMESTIC LLAMA.

THEY'RE NOT OUT HERE WANDERING AROUND BY THEMSELVES.

DUDE, THERE'S A HERDER UP THERE.

HEY!

iHOLA!

IF YOU COME FROM AN AREA THAT'S CLOSER TO SEA LEVEL,

IT'S -- IT'S EASY TO GAUGE YOUR OWN PHYSICALITY.

YOU'RE USED TO IT.

BUT WHEN YOU COME AT THESE HIGHER ELEVATIONS,

IT'S HARD TO SAY HOW YOUR BODY'S GONNA REACT,

SO YOU'VE GOTTA TAKE YOUR TIME, PACE YOURSELF,

NOT PUSH TOO HARD.

I'VE SAID IT A MILLION TIMES I'LL SAY IT AGAIN

FOR THOSE OF YOU THAT DIDN'T HEAR IT THE FIRST TIME.

THERE IS MORE MENTAL ASPECTS TO SURVIVAL THAN PHYSICAL.

YEAH!

YOU GOTTA STAY IN THE FIGHT.

IT'S NOT OVER TILL THE FAT LADY SINGS.

The Description of Braving Bolivia