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♪♪
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Narrator: ANIMALS...
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DO THE MOST INCREDIBLE THINGS.
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[ GOAT BLEATS ]
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LIKE THIS...
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AND THAT.
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I BET YOU'RE WONDERING,
"HOW DO THEY DO THAT?"
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WE'RE REVEALING ANIMALS'
BIGGEST SECRETS, LIKE...
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ARE AFRICA'S GRUMPY
AND AGGRESSIVE RHINOS
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LEADING A SECRET DOUBLE LIFE?
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WHY YOU CAN RUN BUT CAN'T HIDE
FROM A RATTLESNAKE.
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00:00:31,620 --> 00:00:35,137
AND WHY DOES THIS MOLE
HAVE SUCH A WEIRD NOSE?
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THESE WONDERS AND MORE ON...
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--Captions by VITAC--
www.vitac.com
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CAPTIONS PAID FOR BY
DISCOVERY COMMUNICATIONS
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IT'S POLITE TO CHEW
BEFORE YOU SWALLOW,
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BUT COWS TAKE THIS IDEA
TO A WHOLE NEW LEVEL.
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THEY GRIND THEIR MOLARS
LEFT TO RIGHT 50 TIMES A MINUTE,
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40,000 TIMES A DAY...
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14 1/2 MILLION TIMES A YEAR.
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SO...
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♪♪
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MEET DAISY, AN INCREDIBLE THREE-
QUARTER-TON BIOLOGICAL FACTORY.
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[ COW MOOS ]
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SHE'S ABLE TO TURN
ENERGY-SPARSE,
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ALMOST NUTRITIONLESS GRASS
INTO SEVEN GALLONS OF ENERGY
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AND PROTEIN-RICH MILK EVERY DAY.
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THAT'S ENOUGH MILK
FOR 75 PEOPLE.
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GOOD WORK, DAISY.
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BUT BEFORE WE GO OVERBOARD
WITH PRAISE,
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EVEN DAISY WILL ADMIT
THAT SHE'S HAD HELP,
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BECAUSE LURKING INSIDE
HER MASSIVE
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50-GALLON VAT-LIKE STOMACH ARE
A QUADRILLION LITTLE HELPERS.
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REALLY, IT'S THESE GUYS,
THE THOUSANDS OF SPECIES
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OF MICRO-BUG LIVING INSIDE
THIS ALIEN STOMACH WORLD,
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WHO DO ALL OF THE WORK
OF BREAKING DOWN GRASS.
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STILL, IT'S DAISY'S JOB TO KEEP
HER LITTLE WORKERS HAPPY.
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AND TO DO THAT,
SHE HAS TO CHEW A LOT.
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WHEN DAISY FIRST SWALLOWS
THE GRASS,
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IT'S STILL WAY TOO TOUGH FOR
THOSE MICRO-BUGS TO BREAK DOWN.
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SO, TO HELP THE LITTLE GUYS OUT,
AFTER CHEWING
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AND SWALLOWING THE GRASS ONCE,
SHE DOES IT AGAIN.
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DAISY BURPS UP THE HALF-EATEN
GRASS, NOW KNOWN AS CUD,
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BACK INTO HER MOUTH FOR A SECOND
AND MORE INTENSIVE CHEWING.
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BY GRINDING HER MOLARS
EIGHT HOURS A DAY,
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DAISY IS ABLE TO BURST
THROUGH THE GRASS' TOUGH CELLS
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AND TURN IT INTO
A KIND OF SLUDGE.
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THIS TIME, THE SLUDGE
WON'T COME BACK...
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BECAUSE IT'S NOW HEAVY ENOUGH
TO SINK DOWN THROUGH THE LIGHTER
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TOP LAYER
OF RECENTLY EATEN GRASS
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TO THE BOTTOM OF HER HUGE,
CAVERNOUS STOMACH.
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AND THIS IS WHERE THOSE BUSY
LITTLE MICRO-BUGS GET TO WORK.
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♪♪
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MILLIONS OF BILLIONS OF BACTERIA
MUNCH ON THE CARBOHYDRATE
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IN THE GRASS JUICE
AND EXCRETE FATTY ACIDS.
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[ COW MOOS ]
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DAISY HAPPILY SOAKS UP
THESE FATTY ACIDS
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AND USES THEM TO MAKE HER MILK.
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IN FACT, IT IS THESE FATTY ACIDS
THAT HELP TURN THE MILK WHITE.
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[ COW MOOS ]
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UNFORTUNATELY,
TO MAKE THE FATTY ACIDS,
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THE BACTERIA ALSO GIVE OFF
RATHER A LOT OF METHANE.
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[ COW FARTS ]
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DAISY GETS THE BLAME, OF COURSE.
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COWS PRODUCE 200 TIMES
MORE GAS A DAY THAN WE DO.
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[ COW MOOS ]
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SO DAISY'S MILK IS REALLY A
COMBINATION OF BACTERIA DOO-DOO
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WITH A SPLASH OF BUGS
THAT HAVE DIED OF OLD AGE
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AND BEEN ABSORBED
THROUGH HER INTESTINAL WALL!
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YUMMY!
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AND BY SERVING THE GRASS
WELL-CHEWED...
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THE LITTLE WORKERS
IN DAISY'S MILK-FACTORY STOMACH
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ARE OVER THE MOON.
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[ COW MOOS ]
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RHINOS ARE TOUGH
AND FIGHT ROUGH,
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WEIGHING UP TO 4 TONS WITH
A 35-MILES-PER-HOUR CHARGE.
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THE BIGGEST NATURAL KILLER
OF A RHINO IS ANOTHER RHINO.
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BUT RECENT FILMING OF A HERD
OF BLACK RHINOS AT NIGHT
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IN AFRICA'S KALAHARI DESERT
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REVEALED THAT THEY MAY BE
LEADING A SECRET DOUBLE LIFE.
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IN FACT,
UNDER COVER OF DARKNESS,
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RHINOS ARE MORE TENDER
AND GENTLE THAN ANYONE KNEW.
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♪♪
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♪♪
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AT THE RHINO PRIDE SANCTUARY
IN LIMPOPO, SOUTH AFRICA,
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FOUNDER DR. JANA PRETORIUS
HAS A THEORY AS TO WHY RHINOS
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MAY BE GRUMPY AND AGGRESSIVE
BUT ALSO TOUCHY-FEELY.
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AND SHE WANTS TO DEMONSTRATE
HER THEORY WITH A NEW ARRIVAL.
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HE'S AN ADULT MALE BLACK RHINO.
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Pretorious:
THIS RHINO BULL IS FULLY GROWN.
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HE'S BEEN BROUGHT HERE
BEFORE HE MOVES ON
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TO THE NEXT WILDLIFE RESERVE.
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Narrator: HE'S HAD NO CONTACT
WITH HUMANS UNTIL NOW.
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Pretorious: HE'S STILL
A LITTLE BIT WARY OF US.
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♪♪
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HEY.
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COO-COO-COO.
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[ RHINO GRUNTS ]
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Narrator: WITH HIS HORN
AIMED RIGHT AT HER
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AND HIS FEET PAWING THE GROUND,
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THIS RHINO
IS DISPLAYING AGGRESSION.
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JANA THINKS
HE'S BEHAVING THIS WAY
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BECAUSE RHINOS
HAVE VERY BAD EYESIGHT
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AND HIS BEHAVIOR
MAY COME FROM INSECURITY.
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Pretorious:
BECAUSE THEY CAN'T SEE WELL,
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THEY'RE VERY STRESSED ABOUT
SUDDEN MOVES AND SUDDEN SOUNDS,
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AND THAT'S WHY THEY'LL SEEM AS
IF THEY WANT TO BE AGGRESSIVE.
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BUT ACTUALLY,
THEY'RE JUST BEING,
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"OH, WHAT'S THAT, WHAT'S THAT?"
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Narrator: SO JANA TALKS CALMLY
TO THE RHINO
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TO MAKE HIM RELAXED
IN HER COMPANY.
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Pretorious: COO.
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COO-COO-COO.
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Narrator: AND SLOWLY,
THIS WILD RHINO CALMS DOWN
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AND STEPS CLOSER.
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HIS GUARD IS DOWN, AND THE BIG
BULL RHINO DOESN'T JUST RELAX --
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HE ACTUALLY APPROACHES
TO BE TOUCHED.
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SO, A LOT OF PEOPLE
PERCEIVE RHINOS
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JUST AS BEING VERY AGGRESSIVE.
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BUT IF YOU SPEND TIME WITH HIM,
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YOU'LL END UP BEING ABLE
TO SCRATCH HIM AND TALK TO HIM.
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IT'S A WAY OF ACTUALLY
CALMING THEM DOWN.
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Narrator:
JANA'S WORK SHOWS THAT RHINOS
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LIKE TO FEEL CONTACT
WITH OTHER RHINOS,
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BUT THE DESIRE IS STRONGEST
IN THE YOUNGSTERS.
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Pretorious: THEY ALWAYS, LIKE,
TUCK IN TOGETHER,
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00:07:04,482 --> 00:07:06,620
AND THEY'LL PUT THEIR HEADS
ON TOP OF EACH OTHER
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OR THEY'LL LIE HEAD TO FEET.
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Narrator: IN THE WILD,
YOUNG RHINOS ARE VULNERABLE
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TO HYENAS,
CROCODILES, AND LIONS.
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JANA BELIEVES
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BY STAYING IN TOUCHING DISTANCE
OF EACH OTHER,
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THEY FEEL MORE SECURE
AND PROTECTED.
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♪♪
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ONE THING THAT'S SURPRISING
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IS THAT RHINOS
CAN FEEL A GENTLE STROKE AT ALL,
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BECAUSE THEIR SKIN IS THE
THICKEST OF ANY LAND ANIMAL'S.
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Pretorious:
OOH, YES.
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Narrator: DESIGNED TO WITHSTAND
HORN-TO-HORN COMBAT,
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IT'S MADE FROM TOUGH STRANDS
OF COLLAGEN
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MATTED TOGETHER
IN A CROSS LATTICE,
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CREATING A TWO INCH-THICK FORM
OF NATURAL CHAIN MAIL.
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BUT WHAT'S ASTONISHING IS
THE SURFACE OF THE RHINO'S ARMOR
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IS COVERED
IN MILLIONS OF NERVES,
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MAKING THEIR THICK SKIN
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SENSITIVE TO
THE SLIGHTEST TOUCH.
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AND JANA'S DISCOVERED
RHINOS LOVE
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NOTHING MORE THAN
A GOOD RUB OR A TICKLE.
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Pretorious:
ONCE THEY GET USED TO IT,
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YOU ARE PRETTY MUCH FATED
FOR LIFE
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TO GIVE THEM BELLY RUBS.
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YEAH, OVER.
OH, YES.
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♪♪
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Narrator: SO...
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NOT SO TOUGH NOW, ARE YA,
BIG GUY?
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♪♪
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COMING UP, POUND FOR POUND,
THE LOUDEST ANIMAL ON EARTH...
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[ ELEPHANT TRUMPETS ]
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...AND THE FASTEST EATER
ON THE PLANET.
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♪♪
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♪♪
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[ ROOSTER CROWS ]
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[ CATS MEOWING ]
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00:08:51,310 --> 00:08:53,965
Narrator: THE ANIMAL KINGDOM
CAN BE A NOISY PLACE...
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[ WOLF HOWLS ]...FROM THE MALE ELK...
166
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[ ELK SHRIEKS ]
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...THAT SCREAMS
AT THE TOP OF ITS LUNGS
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TO THE GRUNTING ROAR
OF A MALE KOALA.
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00:09:02,586 --> 00:09:04,448
[ KOALA GRUNTING ]
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[ OWL CHIRPS ][ WOLF HOWLS ]
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[ ELEPHANT TRUMPETS ]
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00:09:08,517 --> 00:09:10,448
[ LION ROARS ]BUT POUND FOR POUND...
173
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♪♪
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WHEN IT COMES TO VOLUME
RELATIVE TO SIZE,
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THE HALF-INCH MALE WATER BOATMAN
IS THE UNDISPUTED KING OF NOISE.
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OKAY, YOU MAY NOT BE ABLE
TO HEAR
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00:09:27,103 --> 00:09:30,241
THIS INSECT'S TRUE LOUDNESS
ABOVE THE WATER,
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00:09:30,241 --> 00:09:31,896
BUT UNDERWATER...
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00:09:31,896 --> 00:09:33,241
[ CHIRPING ]
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00:09:33,241 --> 00:09:36,931
...THIS CHIRPING
CAN HIT 99 DECIBELS.
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00:09:36,931 --> 00:09:40,551
THAT'S EQUIVALENT
TO THE RUMBLE OF A TRACTOR.
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00:09:40,551 --> 00:09:43,103
UNUSUALLY,
IT MAKES ALL THAT NOISE
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BY RUBBING ITS PENIS
ACROSS ITS ABDOMEN.
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00:09:47,034 --> 00:09:49,448
WELL, THAT'S ONE WAY
TO ATTRACT THE LADIES.
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00:09:49,448 --> 00:09:54,758
BUT IT'S DEFINITELY NOT
THE LOUDEST ANIMAL ON EARTH.
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NOT RELATIVETO ITS SIZE
BUT BECAUSEOF ITS SIZE,
187
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THE ELEPHANT USES ITS GIGANTIC
TRUNK TO MAKE A BIGGER NOISE.
188
00:10:02,931 --> 00:10:04,275
[ ELEPHANT TRUMPETS ]
189
00:10:04,275 --> 00:10:08,551
THAT MASSIVE NOSE ACTS
AS A HUGE AMPLIFICATION CHAMBER,
190
00:10:08,551 --> 00:10:13,275
CREATING A TRUMPET
WHICH HITS 117 DECIBELS,
191
00:10:13,275 --> 00:10:15,620
ABOUT AS LOUD AS A THUNDERCLAP.
192
00:10:15,620 --> 00:10:17,448
[ THUNDER CRASHES ]
193
00:10:17,448 --> 00:10:19,517
[ BABY CRYING ]
194
00:10:19,517 --> 00:10:22,482
BUT USING JUST ITS TINY LUNGS,
195
00:10:22,482 --> 00:10:26,344
A CRYING BABY DEFEATS
EVEN THE MIGHTIEST ELEPHANT,
196
00:10:26,344 --> 00:10:32,551
CLOCKING UP TO 120 DECIBELS,
THE SAME AS A ROCK CONCERT.
197
00:10:32,551 --> 00:10:34,103
♪♪
198
00:10:34,103 --> 00:10:35,620
[ MONKEY HOWLING ]
199
00:10:35,620 --> 00:10:39,379
BUT SINGING BEATS CRYING.
200
00:10:39,379 --> 00:10:41,413
HOWLER MONKEYS HAVE A HOWL
201
00:10:41,413 --> 00:10:46,793
AS LOUD AS A JET ENGINE
AT 140 DECIBELS,
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00:10:46,793 --> 00:10:51,137
THE LOUDEST CALL
OF ANY ANIMAL ON LAND.
203
00:10:51,137 --> 00:10:55,793
BUT THIS IS NOT THE LOUDEST
ANIMAL ON THE ENTIRE PLANET.
204
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THAT SOUND BELONGS TO
THESE HUGE, MAJESTIC CREATURES.
205
00:11:01,689 --> 00:11:04,448
THE MIGHTY SPERM WHALE
SENDS OUT A SERIES
206
00:11:04,448 --> 00:11:09,275
OF SHORT 100-MILLISECOND-LONG
CLICKS TO ECHOLOCATE THEIR PREY.
207
00:11:09,275 --> 00:11:11,586
♪♪
208
00:11:11,586 --> 00:11:14,310
THE WHALE IS ABLE TO TURN
THE CLICK'S VOLUME UP
209
00:11:14,310 --> 00:11:19,620
TO BEYOND DEAFENING BY USING
THEIR HUGE HEAD AS AN AMPLIFIER.
210
00:11:19,620 --> 00:11:22,793
THE WHALE FORCES AIR
THROUGH ITS NASAL PASSAGE
211
00:11:22,793 --> 00:11:25,448
TO A PAIR OF CLAPPERS
CALLED MONKEY LIPS,
212
00:11:25,448 --> 00:11:28,793
WHICH CLAP SHUT,
CREATING A SINGLE CLICK.
213
00:11:28,793 --> 00:11:32,448
THIS CLICK IS THEN AMPLIFIED
SEVERAL TIMES
214
00:11:32,448 --> 00:11:34,275
AS IT TRAVELS BACKWARD
AND FORWARD
215
00:11:34,275 --> 00:11:37,448
THROUGH THE INSIDE
OF THE SPERM WHALE'S HEAD.
216
00:11:37,448 --> 00:11:40,137
FINALLY, THE CLICK REACHES
AN AREA OF THE HEAD
217
00:11:40,137 --> 00:11:43,931
THAT FOCUSES THE SOUND
INTO A UNIQUELY CONCENTRATED
218
00:11:43,931 --> 00:11:46,517
AND LITERALLY DEAFENING NOISE.
219
00:11:49,862 --> 00:11:53,379
OUR EARS CAN'T COPE
WITH VERY LOUD SOUNDS.
220
00:11:53,379 --> 00:11:58,758
AT 165 DECIBELS,
OUR EARDRUMS RUPTURE.
221
00:11:58,758 --> 00:12:00,827
ABOVE THE WAVES, WE'RE FINE
222
00:12:00,827 --> 00:12:03,965
BECAUSE JUST 1% OF THE SOUND
OF THE WHALE'S CLICKS
223
00:12:03,965 --> 00:12:07,862
PASSES FROM THE WATER
AND INTO THE AIR.
224
00:12:07,862 --> 00:12:14,724
BUT UNDERWATER, EACH CLICK NOISE
REACHES 235 DECIBELS.
225
00:12:14,724 --> 00:12:19,000
THAT'S LOUDER THAN
A TON OF DYNAMITE EXPLODING.
226
00:12:19,000 --> 00:12:22,896
NOT ONLY WILL THE SPERM WHALE'S
CLICKS RUPTURE OUR EARDRUMS,
227
00:12:22,896 --> 00:12:25,620
BUT THE REPETITIVE CLICKING
HAS A FREQUENCY
228
00:12:25,620 --> 00:12:28,448
THAT COULD VIBRATE
A DIVER TO DEATH.
229
00:12:28,448 --> 00:12:30,793
[ WHALE CLICKING ]
230
00:12:30,793 --> 00:12:33,793
SO, WHETHER ABOVE
OR BELOW THE OCEAN,
231
00:12:33,793 --> 00:12:38,586
YOU CAN'T IGNORE THE UNDISPUTED
NOISIEST ANIMAL ON EARTH.
232
00:12:38,586 --> 00:12:43,448
♪♪
233
00:12:43,448 --> 00:12:45,586
COMING UP...
234
00:12:45,586 --> 00:12:49,172
WHY DOES A RATTLESNAKE
ALWAYS LET GO OF ITS PREY?
235
00:12:49,172 --> 00:12:53,068
AND THE CRITTER WITH
THE MOST INCREDIBLE NOSE.
236
00:12:53,068 --> 00:12:55,724
♪♪
237
00:12:59,344 --> 00:13:02,965
♪♪
238
00:13:02,965 --> 00:13:04,068
[ TAIL RATTLES ]
239
00:13:04,068 --> 00:13:07,000
Narrator:
A RATTLE AND THEN...
240
00:13:07,000 --> 00:13:09,344
A STRIKE.
241
00:13:09,344 --> 00:13:13,068
IT LOOKS LIKE GAME OVER
FOR THIS MOUSE.
242
00:13:13,068 --> 00:13:16,620
OR MAYBE NOT.
243
00:13:16,620 --> 00:13:19,275
THE SNAKE'S RELEASED IT.
244
00:13:19,275 --> 00:13:21,551
WHAT IS IT THINKING?
245
00:13:26,620 --> 00:13:28,241
♪♪
246
00:13:28,241 --> 00:13:30,344
IN HOEDSPRUIT, SOUTH AFRICA,
247
00:13:30,344 --> 00:13:33,103
ONE OF THE WORLD'S
LEADING REPTILE EXPERTS,
248
00:13:33,103 --> 00:13:36,068
DONALD STRYDOM,
STUDIES VERY DANGEROUS SNAKES
249
00:13:36,068 --> 00:13:38,241
FROM ALL OVER THE WORLD.
250
00:13:38,241 --> 00:13:42,068
♪♪
251
00:13:42,068 --> 00:13:43,586
[ SNAKE RATTLES ]
252
00:13:43,586 --> 00:13:45,413
Strydom:
YEAH, WHAT WE HAVE HERE
253
00:13:45,413 --> 00:13:48,482
IS A WESTERN DIAMONDBACK
RATTLESNAKE -- BEAUTIFUL ANIMAL.
254
00:13:48,482 --> 00:13:52,275
THESE GUYS ARE
FROM THE AMERICAS.
255
00:13:52,275 --> 00:13:55,448
THEY JUST ARE MASTERS
IN HUNTING.
256
00:13:55,448 --> 00:13:57,034
THEY DON'T CHASE DOWN
THEIR PREY.
257
00:13:57,034 --> 00:13:59,310
THEY'LL LIE THERE
CAMOUFLAGED SOMEWHERE
258
00:13:59,310 --> 00:14:03,000
AND JUST WAIT A DAY OR TWO,
A WEEK, A MONTH, OR MORE.
259
00:14:03,000 --> 00:14:04,413
I MEAN,
THAT SNAKE CAN GO WITHOUT FOOD
260
00:14:04,413 --> 00:14:06,517
FOR LIKE ONE AND A HALF
TO TWO YEARS.
261
00:14:06,517 --> 00:14:07,758
[ SNAKE RATTLES ]
262
00:14:07,758 --> 00:14:10,241
Narrator: AFTER A YEAR
OF WAITING FOR DINNER,
263
00:14:10,241 --> 00:14:14,689
YOU'D THINK THE RATTLESNAKE
WOULD WANT TO HOLD ON TO IT.
264
00:14:14,689 --> 00:14:18,965
BUT AFTER INJECTING
A DROP-SIZED DOSE OF VENOM,
265
00:14:18,965 --> 00:14:23,448
THEY HAVE A GOOD REASON
FOR RELEASING THEIR PREY.
266
00:14:23,448 --> 00:14:26,551
THAT RAT CAN TURN AROUND
AND BITE THE SNAKE.
267
00:14:26,551 --> 00:14:27,862
IT COULD KILL THE SNAKE.
268
00:14:27,862 --> 00:14:30,310
IT WOULD BITE INTO THE HEAD,
THE EYES, AND KILL IT.
269
00:14:30,310 --> 00:14:33,275
Narrator: SO THE SNAKE AVOIDS
BEING BITTEN BACK,
270
00:14:33,275 --> 00:14:36,275
BUT LETTING GO
CREATES ANOTHER PROBLEM.
271
00:14:36,275 --> 00:14:38,931
♪♪
272
00:14:38,931 --> 00:14:41,241
Strydom:
THAT PREY IS GONNA RUN,
273
00:14:41,241 --> 00:14:43,655
AND THE SNAKE HAS TO NOW
LOCATE THAT PREY.
274
00:14:43,655 --> 00:14:45,758
Narrator:
IT TAKES AROUND TWO MINUTES
275
00:14:45,758 --> 00:14:48,448
FOR THE VENOM
TO INCAPACITATE THE PREY.
276
00:14:48,448 --> 00:14:53,344
BY THAT TIME, THE ENVENOMATED
RODENT COULD BE ANYWHERE.
277
00:14:53,344 --> 00:14:57,344
SO HOW DOES THE SNAKE
FIND ITS PREY?
278
00:14:57,344 --> 00:15:00,965
RATTLESNAKES HAVE AN INCREDIBLE
SENSE OF SMELL.
279
00:15:00,965 --> 00:15:05,206
ONE IDEA IS THAT THE SNAKE COULD
FOLLOW THE PREY'S SCENT TRAIL,
280
00:15:05,206 --> 00:15:08,241
EXCEPT, OUT HERE,
THERE ARE HUNDREDS
281
00:15:08,241 --> 00:15:10,241
OF OTHER RODENT SCENT TRAILS
CRISSCROSSING
282
00:15:10,241 --> 00:15:12,241
AND MASKING THE SCENT
OF THE ANIMAL
283
00:15:12,241 --> 00:15:16,586
THAT'LL SOON BE MOTIONLESS
AND EASY TO GRAB.
284
00:15:16,586 --> 00:15:19,586
BUT ONE THING
SETS THE BITTEN RAT APART
285
00:15:19,586 --> 00:15:23,172
FROM ALL THE OTHER CREATURES.
286
00:15:23,172 --> 00:15:27,827
IT HAS THIS RATTLESNAKE'S VENOM
COURSING THROUGH ITS VEINS.
287
00:15:27,827 --> 00:15:31,896
DONALD THINKS THE SNAKE COULD BE
USING THE SCENT OF ITS OWN VENOM
288
00:15:31,896 --> 00:15:35,689
TO TRACK
AND FIND THE DYING PREY.
289
00:15:35,689 --> 00:15:37,275
TO TEST THE THEORY,
290
00:15:37,275 --> 00:15:42,241
DONALD NEEDS TO HARVEST
THE LETHAL RATTLESNAKE VENOM.
291
00:15:42,241 --> 00:15:44,241
Strydom:
IF THAT WERE INTO A MOUSE,
292
00:15:44,241 --> 00:15:45,931
THAT WOULD BE
A MASSIVE OVERKILL,
293
00:15:45,931 --> 00:15:48,137
BUT THAT'S PROBABLY SPOT-ON
TO KILL ME.
294
00:15:48,137 --> 00:15:50,896
♪♪
295
00:15:50,896 --> 00:15:53,724
Narrator: TO MAKE TRAILS
FOR THE SNAKE TO FOLLOW,
296
00:15:53,724 --> 00:15:56,517
DONALD HAS TWO SCENTED SPONGES.
297
00:15:56,517 --> 00:15:59,965
Strydom:
SPONGE NUMBER ONE IS PURELY RAT.
298
00:15:59,965 --> 00:16:03,172
SPONGE NUMBER TWO
IS GOING TO BE RAT,
299
00:16:03,172 --> 00:16:05,413
AS WELL AS SNAKE VENOM.
300
00:16:05,413 --> 00:16:08,965
♪♪
301
00:16:08,965 --> 00:16:12,137
Narrator: DONALD MARKS OUT
TWO SCENT TRAILS.
302
00:16:12,137 --> 00:16:15,172
TO THE LEFT
IS HEALTHY RAT SCENT.
303
00:16:15,172 --> 00:16:21,034
TO THE RIGHT IS RAT SCENT
PLUS THIS SNAKE'S OWN VENOM.
304
00:16:21,034 --> 00:16:23,862
WILL THE SNAKE FOLLOW
THE PURE RAT SCENT,
305
00:16:23,862 --> 00:16:27,448
OR WILL IT FOLLOW THE SMELL
WITH ITS OWN VENOM?
306
00:16:27,448 --> 00:16:28,758
Strydom: THERE IT'S DOING IT.
NOW YOU SEE.
307
00:16:28,758 --> 00:16:29,931
LOOK HOW THE HEAD'S MOVING,
308
00:16:29,931 --> 00:16:32,241
AND THAT TYPICAL
LEFT AND RIGHT MOVEMENT
309
00:16:32,241 --> 00:16:35,517
AND LOTS OF TONGUE FLICKING
AS IT MOVES ALONG.
310
00:16:35,517 --> 00:16:39,793
Narrator: THE TONGUE
IS LICKING THE AIR FOR SCENT.
311
00:16:39,793 --> 00:16:42,827
EACH LICK COLLECTS
TINY SCENT PARTICLES
312
00:16:42,827 --> 00:16:45,931
AND DELIVERS THEM
TO A UNIQUE SCENT ORGAN,
313
00:16:45,931 --> 00:16:50,448
A PATCH OF ODOR-SENSING CELLS
INSIDE THE MOUTH.
314
00:16:50,448 --> 00:16:52,413
THE REASON THE TONGUE IS FORKED
315
00:16:52,413 --> 00:16:54,827
IS SO THAT IT CAN DIFFERENTIATE
ODOR PARTICLES
316
00:16:54,827 --> 00:16:57,793
COMING FROM THE LEFT
AND RIGHT SIDE.
317
00:16:57,793 --> 00:17:02,137
THIS HELPS THE SNAKE FIGURE OUT
THE DIRECTION OF THE PREY.
318
00:17:02,137 --> 00:17:04,275
WHAT IT'S DOING IS OBVIOUSLY
IT'S GOING LEFT AND RIGHT,
319
00:17:04,275 --> 00:17:08,241
SO IT NEEDS TO REALLY SEE WHERE
THE DOMINANT SMELL OF SCENT IS.
320
00:17:08,241 --> 00:17:10,413
Narrator: IT'S REACHED THE POINT
IN THE TRAIL
321
00:17:10,413 --> 00:17:13,275
WHERE DONALD
SEPARATED THE SPONGES...
322
00:17:13,275 --> 00:17:14,482
AND GOES LEFT,
323
00:17:14,482 --> 00:17:17,448
TOWARDS THE SPONGE
WITHOUT VENOM.
324
00:17:17,448 --> 00:17:22,413
♪♪
325
00:17:22,413 --> 00:17:25,103
BUT IT'S CHANGING DIRECTIONS.
326
00:17:25,103 --> 00:17:26,551
IT'S NOT GOING TOWARDS
THE SPONGE
327
00:17:26,551 --> 00:17:27,931
WITH JUST THE SMELL OF PREY.
328
00:17:27,931 --> 00:17:29,586
IT'S GOING STRAIGHT TOWARDS
THAT SPONGE
329
00:17:29,586 --> 00:17:32,758
WITH THE SMELL OF ITS VENOM.
330
00:17:32,758 --> 00:17:36,413
THE SNAKE IS HOMING STRAIGHT IN
FOR ITS PREY.
331
00:17:36,413 --> 00:17:41,344
♪♪
332
00:17:41,344 --> 00:17:44,517
Narrator: BY USING THE SMELL
OF THE RATTLESNAKE'S OWN VENOM,
333
00:17:44,517 --> 00:17:46,103
THE RATTLER CAN CUT THROUGH
334
00:17:46,103 --> 00:17:50,758
ALL THE OTHER DISTRACTING
SCENT TRAILS TO FIND ITS DINNER.
335
00:17:50,758 --> 00:17:52,931
BUT THE RATTLESNAKE
ISN'T SMELLING THE VENOM
336
00:17:52,931 --> 00:17:55,965
IT HAS INJECTED
INTO THE RAT'S BODY.
337
00:17:55,965 --> 00:17:58,379
AFTER THE RATTLESNAKE BITES,
338
00:17:58,379 --> 00:18:02,586
IT MAKES SURE TO SPRAY
SOME VENOM ON THE RAT'S FUR.
339
00:18:02,586 --> 00:18:05,586
Strydom: THIS SPLATTER ON HERE
IS ABOUT THE AMOUNT OF SPLATTER
340
00:18:05,586 --> 00:18:09,206
THAT IT WOULD HAVE
ON THE PREY ITEM.
341
00:18:09,206 --> 00:18:12,965
Narrator: THIS WAY, THE SCENT
OF THE VENOM IS STRONGER
342
00:18:12,965 --> 00:18:17,241
AND MEANS A RATTLESNAKE
IS NEVER LATE TO LUNCH.
343
00:18:20,103 --> 00:18:24,551
COMING UP...
THE WEIRDEST NOSE ON THE PLANET.
344
00:18:24,551 --> 00:18:28,172
♪♪
345
00:18:31,689 --> 00:18:36,310
♪♪
346
00:18:36,310 --> 00:18:38,896
Narrator: THE NATURAL WORLD
IS TEEMING WITH ANIMALS
347
00:18:38,896 --> 00:18:44,379
THAT HAVE EVOLVED UNIQUE AND
BIZARRE NASAL APPENDAGES, BUT...
348
00:18:48,655 --> 00:18:50,172
♪♪
349
00:18:50,172 --> 00:18:53,137
THE MOST BIZARRE NOSE
ON THE PLANET
350
00:18:53,137 --> 00:18:57,000
MAY BE RIGHT BENEATH YOUR FEET,
BECAUSE LIVING IN TUNNELS
351
00:18:57,000 --> 00:18:59,413
UNDERNEATH THE EAST COAST
OF NORTH AMERICA
352
00:18:59,413 --> 00:19:02,275
IS AN ANIMAL
WITH A NOSE SO WEIRD
353
00:19:02,275 --> 00:19:08,241
THAT THE ANIMAL'S BEEN NAMED
AFTER IT -- THE STAR-NOSED MOLE.
354
00:19:08,241 --> 00:19:10,551
SCURRYING THROUGH
TOTAL DARKNESS,
355
00:19:10,551 --> 00:19:14,275
THIS ALMOST-BLIND MOLE
HAS NO NEED FOR EYESIGHT
356
00:19:14,275 --> 00:19:17,724
BECAUSE AMAZINGLY,
THAT STRANGE NOSE IS
357
00:19:17,724 --> 00:19:21,551
THE MOST SENSITIVE TOUCH ORGAN
OF ANY MAMMAL ON THE PLANET,
358
00:19:21,551 --> 00:19:24,034
ALLOWING THIS WEIRD-LOOKING MOLE
359
00:19:24,034 --> 00:19:28,862
TO SEE ITS DARK WORLD
BY FEELING IT.
360
00:19:28,862 --> 00:19:32,206
EVERY INCH OF THOSE
22 MOBILE TENTACLES
361
00:19:32,206 --> 00:19:35,137
ARE COVERED IN THOUSANDS
OF TOUCH RECEPTORS,
362
00:19:35,137 --> 00:19:40,000
EACH BUMP
THE WIDTH OF A HUMAN HAIR.
363
00:19:40,000 --> 00:19:43,724
INSIDE EACH BUMP IS A RING
OF NERVE FIBERS
364
00:19:43,724 --> 00:19:45,793
THAT FEEL IN EVERY DIRECTION
365
00:19:45,793 --> 00:19:49,172
TO CREATE A 3-D MAP
OF WHAT IT TOUCHES,
366
00:19:49,172 --> 00:19:53,413
SO IT SEES WITH ITS NOSE
IN UNBELIEVABLE DETAIL.
367
00:19:53,413 --> 00:19:55,586
♪♪
368
00:19:55,586 --> 00:20:01,172
IN TOTAL, THE MOLE'S NOSE
HAS A NETWORK OF 100,000 NERVES,
369
00:20:01,172 --> 00:20:04,896
FIVE TIMES MORE NERVES
THAN IN OUR HANDS,
370
00:20:04,896 --> 00:20:10,137
ALL PACKED INTO A NOSE
SMALLER THAN A FINGERTIP.
371
00:20:10,137 --> 00:20:13,137
USING INFORMATION
FROM ALL THESE NERVES,
372
00:20:13,137 --> 00:20:16,517
THE MOLE'S BRAIN BUILDS UP
A PICTURE OF WHAT IT'S FEELING.
373
00:20:16,517 --> 00:20:20,793
IT'S A KIND OF TOUCHY-FEELY
"SMELL-O-VISION."
374
00:20:20,793 --> 00:20:25,551
IN FACT, IT TAKES THE MOLE
JUST 120 MILLISECONDS TO TOUCH,
375
00:20:25,551 --> 00:20:28,413
IDENTIFY, AND CONSUME PREY.
376
00:20:28,413 --> 00:20:32,206
THAT'S FASTER THAN
A BLINK OF AN EYE.
377
00:20:32,206 --> 00:20:39,034
IN MAMMAL WORLD, THIS MOLE IS
THE FASTEST EATER ON THE PLANET.
378
00:20:39,034 --> 00:20:42,034
SO, IN A COMPETITION
FOR STRANGEST SNIFFER,
379
00:20:42,034 --> 00:20:46,689
THIS AMAZING AND UNIQUE CRITTER
WINS BY A NOSE.
380
00:20:46,689 --> 00:20:48,000
♪♪
29297
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