All language subtitles for Earth.Odyssey.With.Dylan.Dreyer.S04E03.1080p.WEB.h264-DiRT_track3_[eng]

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NARRATOR: WHEN YOU SEE THIS
SYMBOL, YOU KNOW YOU'RE WATCHING

TELEVISION THAT IS EDUCATIONAL
AND INFORMATIONAL.

THE MORE YOU KNOW ON NBC.

DYLAN: HI, EVERYBODY, I'M DYLAN
DREYER, AND THIS IS "EARTH

ODYSSEY".

TODAY, JOIN US FOR A GIANT
JOURNEY AROUND THE WORLD TO SEE

HOW THESE COLOSSAL CREATURES USE
THEIR SIZE TO THEIR ADVANTAGE.

STARTING IN THE ARCTIC, THE
LARGEST BEARS ON EARTH TRY TO

BITE OFF MORE THAN THEY CAN
CHEW.

THEN, "WHALE" TAKE A TRIP TO THE
OCEAN TO DISCOVER THE UNDISPUTED

LARGEST ANIMAL ON THE PLANET.

AND LATER, YOU WON'T WANT TO BE
CAUGHT IN THE CURRENT WITH THESE

GIANTS OF THE AMAZON BASIN.

[MUSIC]

DYLAN: BEING ONE OF THE WORLD'S
BIGGEST ANIMALS BRINGS HUGE

ADVANTAGES IN THE WILD, BUT IT
CAN ALSO PRESENT ENORMOUS

CHALLENGES, FROM FINDING WAYS TO
MANEUVER THEIR MASSIVE BODIES TO

FINDING ENOUGH FOOD TO KEEP THEM
FULL.

THIS CAN BE ESPECIALLY TRICKY IN
EXTREME ENVIRONMENTS, LIKE THE

ARCTIC, WHERE EARTH'S LARGEST
SPECIES OF BEAR IS ALWAYS ON THE

HUNT FOR A BIG BITE TO EAT.

TAKE A LOOK.

THE ARCTIC, A VAST MARINE
WILDERNESS COVERING MORE THAN

FIVE-AND-A-HALF MILLION SQUARE
MILES, BUT THIS HOSTILE HABITAT

OF FLOATING SEA ICE AND FREEZING
OCEAN WATERS IS THE HUNTING

GROUND OF THE PLANET'S LARGEST
LAND CARNIVORE, THE POLAR BEAR.

IN THIS ENVIRONMENT, BEING A BIG
BEAST WITH A BIG APPETITE

REQUIRES SOME SERIOUS
ADAPTATIONS.

DESPITE WEIGHING IN AT MORE THAN
1,000 POUNDS, THIS ADULT MALE IS

AN EXCELLENT SWIMMER.

A THICK LAYER OF FAT USUALLY
KEEPS HIM WARM IN THE FREEZING

WATERS.

BUT THIS IS LATE SUMMER.

HE'S LOST ALMOST A THIRD OF HIS
BODY MASS.

NOW DESPERATE FOR FOOD, HE
DECIDES TO HEAD BACK TO DRY

LAND.

HE IS A WINTER SPECIALIST, USING
STEALTH AND CAMOUFLAGE TO STALK

SEALS OUT ON THE SEA ICE.

BUT IN THESE CONDITIONS, THE
HUGE WHITE BEAR WILL NEED TO TRY

A DIFFERENT TACTIC.

HE'S BEEN LURED TO THIS
COASTLINE BY THE SCENT OF AN

IMMENSE SUMMER BANQUET.

THESE FROZEN LANDS ARE HOME TO
ANOTHER GIANT.

WALRUSES ARE THE LARGEST SEAL
SPECIES IN THE ARCTIC.

THEY WEIGH MORE THAN 2,000
POUNDS AND ARE ARMED WITH TUSKS

UP TO THREE FEET LONG.

A POLAR BEAR USUALLY ONLY GOES
AFTER THEIR YOUNG, BUT THE

REWARD FROM SUCH A BIG PRIZE
WOULD BE WELL WORTH THE RISK.

DESPERATE TIMES CALL FOR
DESPERATE MEASURES.

FACED WITH AN IMPOSING WALL OF
BLUBBER, HE TRIES TO FIND A WAY

IN.

USING THEIR TUSKS AS DAGGERS,
THE WALRUSES DEFEND THEMSELVES.

AS THEY RETREAT TO THE WATER, HE
MUST MOVE QUICKLY.

BUT THEIR HIDE IS TOO THICK.

WOUNDED FROM THE STRUGGLE, HE
GIVES UP.

THEIR VAST SIZE HAS HELPED THE
WALRUS TO STAY SAFE, AND IT

APPEARS THE WORLD'S LARGEST BEAR
MAY HAVE MET HIS MATCH.

DESPITE BEING THE BIGGEST
CARNIVORE TO HUNT ON LAND, POLAR

BEARS ARE ACTUALLY MARINE
MAMMALS, BUT THEY ARE FAR FROM

THE BIGGEST ANIMAL IN THE OCEAN.

COMING UP, WE TAKE A DEEP DIVE
TO FIND OUT WHAT THIS BLUE WHALE

EATS TO STAY SO MASSIVE.

AND LATER, WE FIND OUT THE
DOWNSIDES TO HAVING THE LONGEST

NECK IN THE WORLD.

PLUS, IN THE AMAZON BASIN, YOU
MAY FEAR THE CAIMANS AND

ANACONDAS, BUT WHAT ANIMALS DO
THEY FEAR?

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NARRATOR: WE NOW RETURN TO THE
MORE YOU KNOW ON NBC.

DYLAN: THE PRIZE FOR THE
LARGEST CREATURE EVER TO HAVE

LIVED GOES TO THE BLUE WHALE.

ONE HUNDRED FEET LONG AND
WEIGHING 330,000 POUNDS, THIS

WHALE OUTRANKS EVEN THE BIGGEST
DINOSAURS.

HIS COLOSSAL BODY MEANS HE HAS
VERY FEW PREDATORS.

ONLY A LARGE POD OF KILLER
WHALES WOULD ATTEMPT TO

OVERPOWER A CREATURE THIS BIG.

AND HIS SIZE BRINGS ANOTHER
BENEFIT.

HE CAN MIGRATE GREAT DISTANCES
WITH LITTLE EFFORT, ALLOWING HIM

TO REACH THE OCEAN'S RICHEST
FEEDING GROUNDS WITH THE HIGHEST

CONCENTRATIONS OF KRILL.

BLUE WHALES EAT AS MUCH AS THEY
CAN IN ONE GO.

GULPING DOWN A MASSIVE 100 TONS
OF KRILL-RICH WATER IN JUST TEN

SECONDS.

IT'S THE BUOYANCY OF THE OCEAN
WATER THAT SUPPORTS THIS GIANT

FRAME, ENABLING WHALES TO GROW
TO A SCALE NOT POSSIBLE ON LAND,

SO THE BLUE WHALE JUST KEEPS
GETTING BIGGER.

BUT MAMMALS AREN'T THE ONLY
GIANTS IN THE OCEAN.

WITH 95 PERCENT OF OUR PLANET'S
SEAS STILL UNEXPLORED, IT'S

THOUGHT THERE COULD BE EVEN
BIGGER CREATURES LURKING DOWN IN

THE DEPTHS.

AND WE'VE ALREADY DISCOVERED
SOME EXTRAORDINARY FISH.

AT MORE THAN 33 FEET LONG AND
WEIGHING UP TO 20 TONS, THE

WHALE SHARK IS THE WORLD'S
LARGEST FISH.

YET IT SURVIVES SOLELY ON A DIET
OF PLANKTON.

IT SWIMS AT A TOP SPEED OF JUST
THREE MILES AN HOUR, SUCKING IN

WATER WITH ITS HUGE MOUTH FIVE
FEET ACROSS.

ITS GILL RAKERS PROCESS MORE
THAN 1,000 GALLONS AN HOUR, BUT

THE REAL SECRET TO ITS SIZE IS A
MORE RECENT DISCOVERY.

THIS SHARK IS NEGATIVELY
BUOYANT.

IT CAN SINK TO THE BOTTOM OF THE
OCEAN TO REACH ITS FOOD USING

AROUND 30 PERCENT LESS ENERGY.

THIS INCREASES ITS FEEDING TIME
AND THE AMOUNT IT CAN CONSUME,

BUT IT'S NOT JUST UNDERWATER
THAT THE BENEFITS OF SIZE CAN BE

REAPED.

COMING UP, HOW DO THE BIGGEST
CREATURES OF THE AMAZON BASIN

COMMAND RESPECT IN A REGION
ALREADY FULL OF THE FEARLESS AND

FEROCIOUS?

BUT FIRST, IT CAN BE A
HIGH-PRESSURE JOB TO KEEP A

GIRAFFE ON ITS TOES.

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NARRATOR: WE NOW RETURN TO THE
MORE YOU KNOW ON NBC.

DYLAN: YOU MIGHT ASSUME THAT
THE BIGGEST ANIMALS ON EARTH GET

THAT WAY BY BEING CARNIVORES,
ANIMALS WHO EAT MEAT.

BUT THERE'S ONE MASSIVE MAMMAL
THAT NEVER EATS MEAT, AND IT

TOWERS OVER ITS CARNIVORE
BROTHERS AND SISTERS.

LET'S MEET THIS VEGETARIAN
CONTRARIAN, THE AFRICAN GIRAFFE.

WHEN IT COMES TO FINDING FOOD,
LAND-LIVING GIANTS HAVE LEARNED

TO MAKE THE MOST OF THEIR
STATURE.

STANDING UP TO 16 FEET HIGH,
THIS GIRAFFE SEEMS TO HAVE IT

MADE WITH FEET THE SIZE OF
DINNER PLATES AND A NECK THAT

STRETCHES TO ALMOST HALF ITS
HEIGHT.

BEING HEAD AND SHOULDERS ABOVE
THE REST CERTAINLY HAS ITS

PERKS.

IT MAKES GETTING THE HARDEST TO
REACH LEAVES A BREEZE,

ESPECIALLY WITH AN 18-INCH
TONGUE TO GO THE EXTRA DISTANCE.

JUST AS WELL, BECAUSE GIRAFFES
HAVE A SUPER-SIZED APPETITE,

CONSUMING UP TO 140 POUNDS A
DAY.

BUT LONG NECKS COME AT A COST.

AS IT STRETCHES UP, THE THICK
MUSCLE WALLS OF ITS SURPRISINGLY

POWERFUL HEART MUST DRIVE BLOOD
UP TO THE BRAIN AT A PHENOMENAL

PRESSURE.

GIRAFFES HAVE THE HIGHEST BLOOD
PRESSURE OF ANY ANIMAL, WHICH

SHOULD CAUSE A PROBLEM WHEN THEY
DROP THEIR HEAD DOWN TO DRINK.

BUT WHILE OTHER ANIMALS WOULD
FAINT UNDER SUCH PRESSURE,

SPECIALIZED VALVES IN THE
GIRAFFE'S NECK COUNTER THE

POTENTIALLY EXPLOSIVE EFFECTS OF
GRAVITY, BLOCKING ALL THIS BLOOD

FROM FLOWING INTO ITS SKULL.

THIS SIMPLE SOLUTION IS NOW USED
IN NASA'S SPACESUITS.

IT MAY BE ONE SMALL STEP IN
EVOLUTION FOR THE GIRAFFE, BUT

IT'S LED TO A GIANT LEAP FOR
MANKIND.

THE GIRAFFE'S LONG NECK AND
UNIQUE ADAPTATIONS ALLOW IT TO

FEED WITH EASE, BUT MANY OF
NATURE'S GIANTS HAVE TO FIGHT

FOR THEIR FOOD.

IT'S SPRING IN TURKEY'S ALPINE
FORESTS, AND THE REGION'S

MIGHTIEST RESIDENT HAS RECENTLY
EMERGED FROM A LONG HIBERNATION.

AFTER SIX MONTHS WITHOUT FOOD OR
WATER, THE RAIN IS A WELCOME

RELIEF.

BUT HIS PRIMARY CONCERN IS
FINDING SOMETHING TO EAT.

BROWN BEARS CAN LOSE UP TO 40
PERCENT OF THEIR BODY WEIGHT

DURING HIBERNATION.

WHILE ON THE MOVE, HE RUBS
AGAINST TREES, LEAVING A CLEAR

MESSAGE OF HIS SIZE AND STATUS,
HOPEFULLY WARDING OFF ANY

WOULD-BE INTRUDERS.

HE'S ON A COUNTDOWN TO BREEDING
SEASON.

AND IF HE IS TO STAKE A CLAIM TO
ANY FEMALES IN HIS HOME RANGE,

HE NEEDS TO BULK UP.

LARGER MALES HAVE BETTER MATING
SUCCESS.

BUT HE'S NOT THE ONLY HUNGRY ONE
IN THE FOREST.

A RIVAL.

HE'S SMALLER, BUT HE'S NOT
BACKING DOWN.

[BEARS SNARLING]

SIZE MATTERS HERE, AND IT'S WON
HIM THE RIGHT TO THE AREA.

HE CAN NOW GET BACK TO THE VERY
IMPORTANT JOB OF FINDING FOOD.

SADLY, THE BEST PICKINGS ARE OUT
OF REACH.

SURPRISINGLY, FOR A BEAST
WEIGHING ALMOST 900 POUNDS,

BROWN BEARS ARE EXCELLENT
CLIMBERS.

HIS GIANT CLAWS AND PAWS ALLOW
HIM A SECURE GRIP, AND HE

FINALLY GETS A CHANCE TO ENJOY
HIS WINNINGS.

WHILE BROWN BEARS USE THEIR SIZE
TO THEIR ADVANTAGE, THERE ARE

SOME NEGATIVES TO LIVE ON THE
LARGER SIDE.

CARRYING EXTRA WEIGHT REDUCES
BOTH SPEED AND AGILITY, BUT HE

WON'T LET THAT STOP HIM.

COMING UP, WE'LL JUMP IN WITH
THE GIANTS OF THE AMAZON BASIN,

BUT WHO'S THE MOST DANGEROUS OF
THEM ALL?

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NARRATOR: WE NOW RETURN TO THE
MORE YOU KNOW ON NBC.

DYLAN: THE AMAZON BASIN IN
BRAZIL, A HIDDEN KINGDOM RULED

BY GIANTS.

SIXTEEN-FOOT-LONG CAIMAN PATROL
THE WATERS...

...WHILE THE LARGEST CAT IN
SOUTH AMERICA, THE JAGUAR,

STALKS THE RIVERBANK.

TO COMPETE WITH THIS REGION'S
OVERSIZED KILLERS, A USUALLY

SMALL ANIMAL HAS GROWN TO AN
EXTRAORDINARY SIZE.

THESE AMAZON BACKWATERS ARE HOME
TO THE GIANT BRAZILIAN OTTER.

ADULTS CAN REACH NEARLY SIX FEET
IN LENGTH.

THAT'S MORE THAN TWICE AS BIG AS
A NORTH AMERICAN RIVER OTTER.

THIS FAMILY HAS YOUNG TO FEED.

AND THAT IS A FULL-TIME JOB.

LUCKILY, THEIR SIZE AND STRENGTH
MAKES THEM EXCELLENT AQUATIC

HUNTERS.

THEIR DIET CONSISTS ALMOST
EXCLUSIVELY OF FISH.

BUT THEY'VE BEEN KNOWN TO EAT
ANACONDA AND EVEN SMALL CAIMAN.

THEY CAN CONSUME UP TO 20
PERCENT OF THEIR TOTAL BODY

WEIGHT EACH DAY.

THAT'S A LOT OF FOOD TO CATCH.

SO, FOR THIS FAMILY, IT REQUIRES
TEAMWORK TO FILL EVERYONE'S

BELLIES.

EVEN THE YOUNGEST MEMBERS ARE
FORCED TO JOIN IN WITH THE TASK.

DESPITE THE MURKY WATER, THEY
HUNT WITH PRECISION.

IT'S NO WONDER THEY'RE KNOWN AS
RIVER WOLVES.

THEIR WHISKERS DETECT THE
MOVEMENT OF PREY, AND TOGETHER,

THEY HERD THE FISH TOWARDS THE
BANK.

WHEN ONE LANDS A SUCCESSFUL
CATCH, THEY'LL RARELY SHARE, BUT

EVERYONE WILL EVENTUALLY GET
THEIR TURN.

THANKS TO THEIR SIZE AND SPEED,
THE GIANT RIVER OTTERS CAN

COMPETE WITH THE LIKES OF
JAGUARS AND CAIMAN FOR FOOD,

ALLOWING IT TO SURVIVE IN A
COMPETITIVE ENVIRONMENT.

THANK YOU FOR JOINING US ON OUR
ADVENTURE AROUND THE WORLD TO

FIND SOME OF THE GIANTS OF THE
ANIMAL KINGDOM.

FROM MASSIVE MAMMALS IN THE
AFRICAN SAFARI TO THE SEISMIC

SEA CREATURES OF THE OCEANS,
THESE ANIMALS HAVE BEEN LARGE

AND IN CHARGE FOR THOUSANDS OF
YEARS.

WE'LL SEE YOU ON OUR NEXT "EARTH
ODYSSEY".

[MUSIC]