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These are the user uploaded subtitles that are being translated: 1 00:00:01,000 --> 00:00:02,862 ♪♪ 2 00:00:02,862 --> 00:00:05,000 Narrator: ANIMALS... 3 00:00:05,000 --> 00:00:07,310 DO THE MOST INCREDIBLE THINGS. 4 00:00:07,310 --> 00:00:09,068 [ GOAT BLEATS ] 5 00:00:09,068 --> 00:00:10,758 LIKE THIS... 6 00:00:10,758 --> 00:00:12,206 AND THIS. 7 00:00:12,206 --> 00:00:15,862 I BET YOU'RE WONDERING, "HOW DO THEY DO THAT?" 8 00:00:15,862 --> 00:00:21,137 WE'RE REVEALING ANIMALS' BIGGEST SECRETS, LIKE... 9 00:00:21,137 --> 00:00:22,620 HOW DO SEA TURTLES FIND 10 00:00:22,620 --> 00:00:24,862 THE EXACT SAME BEACH WHERE THEY HATCHED 11 00:00:24,862 --> 00:00:27,827 AFTER 20 YEARS AT SEA? 12 00:00:27,827 --> 00:00:31,137 WHAT'S THE SECRET BEHIND A DOG'S BARK? 13 00:00:31,137 --> 00:00:36,310 AND HOW AND WHY DO SLOTHS TURN GREEN? 14 00:00:36,310 --> 00:00:38,827 THESE WONDERS AND MORE ON... 15 00:00:39,724 --> 00:00:42,724 --Captions by VITAC-- www.vitac.com 16 00:00:42,724 --> 00:00:45,724 CAPTIONS PAID FOR BY DISCOVERY COMMUNICATIONS 17 00:00:45,724 --> 00:00:49,310 THEY'RE OUR BEST FRIENDS IN THE ANIMAL KINGDOM, 18 00:00:49,310 --> 00:00:52,827 BUT EVEN BEST FRIENDS CAN HAVE SOME ANNOYING HABITS. 19 00:00:52,827 --> 00:00:57,689 [ DOGS BARKING ] 20 00:00:57,689 --> 00:01:00,793 SOME HABITS ALSO ANNOY THE NEIGHBORS 21 00:01:00,793 --> 00:01:02,620 BUT NOT ALWAYS THE OWNER. 22 00:01:02,620 --> 00:01:04,482 BECAUSE FOR THOUSANDS OF YEARS, 23 00:01:04,482 --> 00:01:09,241 DOGS HAVE BEEN BARKING THEIR WAY INTO THEIR OWNERS' HEARTS. 24 00:01:09,241 --> 00:01:12,310 WHAT'S THE SECRET BEHIND A DOG'S BARK? 25 00:01:15,655 --> 00:01:17,000 THE DOG'S BARK ORIGINATES 26 00:01:17,000 --> 00:01:19,310 FROM THEIR COMMON ANCESTORS, THE WOLF. 27 00:01:19,310 --> 00:01:21,655 COME ON. [ CHUCKLES ] 28 00:01:21,655 --> 00:01:24,655 IN NEW MEXICO, LEYTON COUGAR RUNS A SANCTUARY 29 00:01:24,655 --> 00:01:28,000 THAT RESCUES CAPTIVE-BRED WOLVES AND WOLF DOGS. 30 00:01:31,758 --> 00:01:33,827 FOR 20 YEARS, LEYTON HAS STUDIED 31 00:01:33,827 --> 00:01:35,793 BARKING, HOWLING, AND OTHER SOUNDS 32 00:01:35,793 --> 00:01:37,344 COMING FROM WOLVES. 33 00:01:40,172 --> 00:01:42,758 AND TO TRY TO FIGURE OUT WHY DOGS BARK, 34 00:01:42,758 --> 00:01:46,310 HE'S INVESTIGATED THE DIFFERENT WAYS WOLVES COMMUNICATE. 35 00:01:46,310 --> 00:01:48,103 OKAY. 36 00:01:48,103 --> 00:01:52,344 FLURRY IS THE ALPHA MALE OF THE WOLF PACK. 37 00:01:52,344 --> 00:01:55,137 SO RIGHT NOW, AS FLURRY LEAVES THE COMPOUND, 38 00:01:55,137 --> 00:01:57,724 THE WOLVES ARE SINGING ABOUT IT. 39 00:01:57,724 --> 00:02:00,965 THEY'RE COMMUNICATING THAT FLURRY IS LEAVING THE PACK. 40 00:02:00,965 --> 00:02:02,862 [ HOWLING ] 41 00:02:02,862 --> 00:02:05,689 Narrator: WHEN FLURRY GETS MORE THAN 100 YARDS AWAY, 42 00:02:05,689 --> 00:02:08,137 IT BECOMES A TWO-WAY CONVERSATION... 43 00:02:08,137 --> 00:02:10,137 [ HOWLING CONTINUES ] 44 00:02:10,137 --> 00:02:12,586 ...USING THAT INFAMOUS WOLF HOWL. 45 00:02:12,586 --> 00:02:15,965 WOLVES, WHEN THEY'RE VOCALIZING, WHEN THEY'RE HOWLING -- 46 00:02:15,965 --> 00:02:19,275 THEY'RE COMMUNICATING TO OTHER PACK MEMBERS. 47 00:02:19,275 --> 00:02:21,724 [ HOWLING CONTINUES ] 48 00:02:21,724 --> 00:02:25,689 Narrator: THE HOWL IS LIKE A LONG-DISTANCE PHONE CALL SAYING... 49 00:02:25,689 --> 00:02:27,689 "HEY, GUYS, GUESS WHERE I AM." 50 00:02:28,793 --> 00:02:29,965 THEY'RE STILL SINGING FOR YOU, 51 00:02:29,965 --> 00:02:31,275 SO LET'S GET YOU BACK TO YOUR HOUSE. 52 00:02:31,275 --> 00:02:33,724 COME ON. LET'S WALK. 53 00:02:33,724 --> 00:02:37,620 Narrator: WHEN FLURRY GETS BACK, THE HOWLING STOPS. 54 00:02:37,620 --> 00:02:40,379 BUT ANOTHER TYPE OF WOLF COMMUNICATION CAN START -- 55 00:02:40,379 --> 00:02:44,517 THE BARK. 56 00:02:44,517 --> 00:02:46,517 SCIENTISTS THINK THE WOLF'S BARK 57 00:02:46,517 --> 00:02:48,965 MAY BE WHAT STARTED THE UNIQUE RELATIONSHIP 58 00:02:48,965 --> 00:02:51,275 THAT WE HAVE WITH OUR DOGS. 59 00:02:53,344 --> 00:02:55,448 AROUND 40,000 YEARS AGO, 60 00:02:55,448 --> 00:02:58,103 HUMANS HAD TO WORRY ABOUT BEING ATTACKED -- 61 00:02:58,103 --> 00:03:03,000 BY BOTH OTHER HUMANS AND WILD BEASTS. 62 00:03:03,000 --> 00:03:05,551 THEY NEEDED AN EARLY-WARNING SYSTEM, 63 00:03:05,551 --> 00:03:10,310 AND THEY GOT IT BY ADOPTING ORPHANED WOLF CUBS. 64 00:03:10,310 --> 00:03:17,275 A WOLF WILL INSTINCTIVELY BARK TO WARN THE PACK OF DANGER. 65 00:03:17,275 --> 00:03:21,103 THAT WARNING BARK IS REALLY SOMETHING THAT HUMANS WANTED 66 00:03:21,103 --> 00:03:23,413 BECAUSE YOU WANT TO PROTECT YOUR CAMP, 67 00:03:23,413 --> 00:03:24,793 AND WHEN THERE'S A CANINE 68 00:03:24,793 --> 00:03:27,931 WHO CAN HEAR AND SEE WAY BETTER THAN WE CAN, 69 00:03:27,931 --> 00:03:33,724 HAVING THAT WARNING BARK IS REALLY ESSENTIAL FOR HUMANS. 70 00:03:33,724 --> 00:03:35,103 Narrator: OVER TIME, 71 00:03:35,103 --> 00:03:39,448 GUARD WOLVES WERE BRED INTO DOMESTICATED GUARD DOGS, 72 00:03:39,448 --> 00:03:41,931 AND AS THEIR RELATIONSHIP WITH HUMANS CHANGED, 73 00:03:41,931 --> 00:03:44,862 THE MEANINGS OF THE DOGS' BARKS CHANGED. 74 00:03:48,724 --> 00:03:51,103 DOGS HAVE LEARNED TO ADAPT THEIR BARKS 75 00:03:51,103 --> 00:03:54,931 FOR DIFFERENT SITUATIONS AND DIFFERENT SCENARIOS. 76 00:03:54,931 --> 00:03:59,379 Narrator: AS THE HOWL BECAME A LESSER PART OF DOG LANGUAGE, 77 00:03:59,379 --> 00:04:03,172 DOMESTICATED DOG BARKS HAVE EVOLVED TO HELP THEM COMMUNICATE 78 00:04:03,172 --> 00:04:04,931 WITH DELIVERY PEOPLE, 79 00:04:04,931 --> 00:04:06,551 INATTENTIVE OWNERS, 80 00:04:06,551 --> 00:04:09,137 AND NEIGHBORS' CATS. 81 00:04:09,137 --> 00:04:13,310 AND DOGS HAVE LEARNED TO BE EVEN MORE COMMUNICATIVE WITH US. 82 00:04:13,310 --> 00:04:15,172 BY CHANGING THE PITCH OF ITS BARK, 83 00:04:15,172 --> 00:04:19,344 A DOG CAN SAY MANY DIFFERENT THINGS. 84 00:04:19,344 --> 00:04:20,965 EVERY GOOD DOG OWNER KNOWS 85 00:04:20,965 --> 00:04:25,517 EXACTLY WHAT THEIR DOG'S BARKS MEAN. 86 00:04:25,517 --> 00:04:28,482 Narrator: SCIENTISTS HAVE PUT THIS TO THE TEST. 87 00:04:28,482 --> 00:04:31,586 RESEARCHERS RECORDED DIFFERENT BARKS MADE BY DOGS 88 00:04:31,586 --> 00:04:35,482 IN A VARIETY OF SITUATIONS. 89 00:04:35,482 --> 00:04:37,724 AND IT TURNS OUT WE'RE SURPRISINGLY GOOD 90 00:04:37,724 --> 00:04:41,517 AT UNDERSTANDING WHAT DOGS ARE SAYING. 91 00:04:41,517 --> 00:04:44,241 FROM "I WOULD REALLY, REALLY, REALLY LIKE 92 00:04:44,241 --> 00:04:46,965 TO HAVE THAT BALL YOU'RE HOLDING," 93 00:04:46,965 --> 00:04:52,551 TO THIS HIGH-PITCHED LONGER BARK WITH SHORT PAUSES THAT SAYS, 94 00:04:52,551 --> 00:04:55,103 "I'M LONELY. WHERE ARE YOU?" 95 00:04:58,241 --> 00:04:59,793 SOME SCIENTISTS NOW THINK 96 00:04:59,793 --> 00:05:03,448 THAT IT WAS OUR ADOPTION OF WOLVES 40,000 YEARS AGO 97 00:05:03,448 --> 00:05:08,137 THAT LED TO THE SUPREMACY OF HOMO SAPIENS OVER NEANDERTHALS. 98 00:05:08,137 --> 00:05:12,241 WE DO KNOW THAT NEANDERTHAL MAN AND MODERN MAN 99 00:05:12,241 --> 00:05:15,275 WALKED ON PLANET EARTH AT THE SAME EXACT TIME, 100 00:05:15,275 --> 00:05:19,137 BUT THE DIFFERENCE BETWEEN THEM IS THE DOG. 101 00:05:19,137 --> 00:05:20,379 Narrator: BY ADOPTING WOLVES 102 00:05:20,379 --> 00:05:23,000 AND BREEDING THEM INTO DOMESTICATED DOGS, 103 00:05:23,000 --> 00:05:26,793 HUMANS FOUND A FURRY FRIEND THAT WOULD WARN THEM OF DANGERS, 104 00:05:26,793 --> 00:05:30,827 FIGHT OFF ENEMIES, AND HUNT FOR FOOD. 105 00:05:30,827 --> 00:05:33,413 SUDDENLY, HUMANS COULD FIND AND KILL THEIR DINNER 106 00:05:33,413 --> 00:05:39,344 A LOT QUICKER THAN THEIR NEANDERTHAL RIVALS. 107 00:05:39,344 --> 00:05:42,241 SO EVEN IF THE BARKING DOES GET IRRITATING, 108 00:05:42,241 --> 00:05:46,551 IF IT WASN'T FOR FIDO, WE'D ALL LOOK LIKE NEANDERTHALS. 109 00:05:51,448 --> 00:05:53,310 ♪♪ 110 00:05:53,310 --> 00:05:56,896 SLOW-MOVING SLOTHS ARE BORN BROWN, 111 00:05:56,896 --> 00:06:00,379 BUT IN THE WILD OVER TIME THEY TURNED GREEN, 112 00:06:00,379 --> 00:06:01,896 WHICH IS SUPER STRANGE BECAUSE 113 00:06:01,896 --> 00:06:05,689 NATURE DOESN'T MAKE GREEN MAMMALS. 114 00:06:05,689 --> 00:06:07,517 NO GREEN DOGS. 115 00:06:07,517 --> 00:06:09,448 NO GREEN CATS. 116 00:06:09,448 --> 00:06:11,275 NO GREEN POLAR BEARS. 117 00:06:11,275 --> 00:06:15,103 SO HOW AND WHY DID SLOTHS TURN GREEN? 118 00:06:16,965 --> 00:06:19,586 LOTS OF ANIMALS LIKE TO MAKE THEMSELVES AT HOME 119 00:06:19,586 --> 00:06:21,517 ON OTHER ANIMALS. 120 00:06:21,517 --> 00:06:24,310 BARNACLES CLING TO WHALES. 121 00:06:24,310 --> 00:06:27,758 TICKS LOVE SHAGGY DOGS. 122 00:06:27,758 --> 00:06:30,068 AND REMORAS LOVE A SHARK. 123 00:06:33,137 --> 00:06:35,965 LIVING IN THE EMERALD GREEN FUR OF A WILD SLOTH 124 00:06:35,965 --> 00:06:38,620 IS NOT ONE CRITTER, 125 00:06:38,620 --> 00:06:40,620 BUT A BUSTLING, GIANT COLONY 126 00:06:40,620 --> 00:06:46,103 OF MITES, TICKS, BEETLES, AND MOTHS. 127 00:06:46,103 --> 00:06:50,724 IT'S LIKE THE SLOTH IS A MINIATURE SLOW-MOVING FOREST, 128 00:06:50,724 --> 00:06:52,310 AND THERE'S A REASON FOR THAT. 129 00:06:55,620 --> 00:06:57,379 THE SLOTH'S GREEN COAT 130 00:06:57,379 --> 00:07:00,413 IS THE RESULT OF AN AMAZING PROCESS. 131 00:07:00,413 --> 00:07:02,620 FIRST, ITS UNIQUE INDIVIDUAL HAIRS 132 00:07:02,620 --> 00:07:06,344 HAVE TINY GROOVES THAT COLLECT RAINWATER. 133 00:07:06,344 --> 00:07:09,896 THE NATURAL SALTS AND MINERALS IN BOTH HAIR AND RAINWATER 134 00:07:09,896 --> 00:07:11,689 MEAN ALGAE CAN GROW IN THOSE RIDGES 135 00:07:11,689 --> 00:07:14,862 WITHOUT NEEDING NUTRIENTS FROM SOIL. 136 00:07:14,862 --> 00:07:16,482 ESSENTIALLY, OVER TIME, 137 00:07:16,482 --> 00:07:19,206 THE SLOW-MOVING SLOTH'S THICK, COARSE FUR 138 00:07:19,206 --> 00:07:24,448 TURNS INTO A LUSCIOUS, GREEN ALGAE GARDEN. 139 00:07:24,448 --> 00:07:27,379 SO, INSECTS ARRIVE TO EAT THE ALGAE 140 00:07:27,379 --> 00:07:29,862 AND DECIDE THEY LIKE THE NEIGHBORHOOD SO MUCH 141 00:07:29,862 --> 00:07:33,068 THAT THEY MOVE IN AND SETTLE DOWN. 142 00:07:33,068 --> 00:07:35,172 WORD GETS AROUND, AND BEFORE YOU KNOW IT, 143 00:07:35,172 --> 00:07:38,172 THE SLOTH BECOMES INSECT CENTRAL. 144 00:07:38,172 --> 00:07:41,310 THEN WHEN THE OLDER INSECT RESIDENTS DIE OFF, 145 00:07:41,310 --> 00:07:44,758 THEIR DECOMPOSING BODIES BECOME FOOD FOR THE GREEN ALGAE, 146 00:07:44,758 --> 00:07:48,931 AND SO THE WHOLE GREEN CYCLE CONTINUES. 147 00:07:51,034 --> 00:07:53,448 IT MAY LOOK LIKE AN ITCHY MESS, 148 00:07:53,448 --> 00:07:58,206 BUT THIS LIVING ARRANGEMENT IS ACTUALLY GOOD FOR THE SLOTH. 149 00:08:00,931 --> 00:08:04,931 IF THERE'S ONE THING THE HARPY EAGLE LOVES EATING FOR LUNCH, 150 00:08:04,931 --> 00:08:06,620 IT'S SLOTH. 151 00:08:06,620 --> 00:08:11,586 THIS APEX PREDATOR STANDS NEARLY FOUR FEET TALL, 152 00:08:11,586 --> 00:08:13,793 AND THERE'S NO WAY A SLOW-MOVING SLOTH 153 00:08:13,793 --> 00:08:17,551 CAN OUTRUN THE 50-MILE-AN-HOUR RAPTOR. 154 00:08:17,551 --> 00:08:19,724 THE SOLUTION -- 155 00:08:19,724 --> 00:08:22,931 IMITATE A BUSH OR TREE. 156 00:08:22,931 --> 00:08:25,931 SO THE SLOTH, THE ALGAE, AND THE INSECTS 157 00:08:25,931 --> 00:08:29,068 HAVE ENTERED INTO A CONVENIENT MUTUAL ARRANGEMENT. 158 00:08:32,655 --> 00:08:36,172 IN FACT, ALGAE ARE SO IMPORTANT TO THE SLOTH, 159 00:08:36,172 --> 00:08:38,586 A MOTHER WILL HOLD HER YOUNGSTER CLOSE 160 00:08:38,586 --> 00:08:41,551 TO ENCOURAGE THE ALGAE TO COVER THE BABY, 161 00:08:41,551 --> 00:08:45,344 AND THAT KEEPS THEM BOTH SAFE FROM PREDATORS. 162 00:08:50,034 --> 00:08:51,482 COMING UP, 163 00:08:51,482 --> 00:08:55,965 ANIMALS THAT CAN JUMP MORE THAN 20 TIMES THEIR OWN HEIGHT 164 00:08:55,965 --> 00:09:00,758 AND HOW SEA TURTLES REMEMBER EXACTLY WHERE THEY WERE BORN. 165 00:09:12,000 --> 00:09:14,068 NARRATOR: THE ANIMAL KINGDOM IS FULL OF CREATURES 166 00:09:14,068 --> 00:09:18,241 WHO LEAP INTO ACTION WHEN LIFE DEMANDS IT. 167 00:09:18,241 --> 00:09:22,586 FROM TIGERS WHO JUMP 12 FEET FOR THEIR DINNER... 168 00:09:22,586 --> 00:09:27,344 TWO GAZELLES WHO VAULT TO AVOID BECOMING PREY. 169 00:09:27,344 --> 00:09:31,793 ANIMALS GO AIRBORNE FOR A WHOLE HOST OF REASONS, 170 00:09:31,793 --> 00:09:35,275 BUT WHO IS NATURE'S GREATEST JUMPER? 171 00:09:38,620 --> 00:09:40,827 WHEN IT COMES TO JUMPING THE LONGEST, 172 00:09:40,827 --> 00:09:44,379 THERE IS ONE ANIMAL THAT SPRINGS TO MIND -- 173 00:09:44,379 --> 00:09:46,896 THE KANGAROO. 174 00:09:46,896 --> 00:09:50,275 KANGAROOS CAN COVER AN IMPRESSIVE 25 FEET 175 00:09:50,275 --> 00:09:53,896 IN A SINGLE BOUND. 176 00:09:53,896 --> 00:09:59,137 BUT THERE'S AN ANIMAL THAT CAN JUMP FARTHER THAN A KANGAROO -- 177 00:09:59,137 --> 00:10:00,862 US. 178 00:10:00,862 --> 00:10:05,689 OLYMPIC LONG JUMPERS CAN HURL THEMSELVES MORE THAN 29 FEET. 179 00:10:05,689 --> 00:10:09,896 THAT MAKES HUMANS ONE OF THE LONGEST LEAPERS ON LAND. 180 00:10:09,896 --> 00:10:13,862 BUT WHAT ANIMAL JUMPS THE HIGHEST? 181 00:10:13,862 --> 00:10:15,827 THE FOUR-OUNCE KANGAROO RAT JUMPS 182 00:10:15,827 --> 00:10:17,862 BECAUSE ITS LIFE DEPENDS ON IT. 183 00:10:22,758 --> 00:10:25,137 WHEN A RATTLESNAKE STRIKES, 184 00:10:25,137 --> 00:10:28,862 SPRINGY TENDONS IN THE RAT'S PROPORTIONALLY HUGE BACK LEGS 185 00:10:28,862 --> 00:10:32,793 REACT IN JUST 40 MILLISECONDS -- 186 00:10:32,793 --> 00:10:35,551 10 TIMES FASTER THAN THE BLINK OF AN EYE, 187 00:10:35,551 --> 00:10:38,482 THROWING THEM AWAY FROM DANGER. 188 00:10:38,482 --> 00:10:41,827 THEY CAN REACH HEIGHTS OF NINE FEET. 189 00:10:41,827 --> 00:10:44,206 THAT'S 20 TIMES THEIR OWN LENGTH. 190 00:10:46,793 --> 00:10:50,137 BUT, SURPRISINGLY, THE GREATEST JUMPER OF THEM ALL 191 00:10:50,137 --> 00:10:53,310 IS ONE OF THE TINIEST CREATURES -- 192 00:10:53,310 --> 00:10:55,000 THE HUMBLE FLEA. 193 00:10:57,103 --> 00:11:00,965 THESE MINI BLOODSUCKERS ARE NO BIGGER THAN A GRAIN OF RICE, 194 00:11:00,965 --> 00:11:03,137 AND THEIR FOOD, INCLUDING OUR PETS, 195 00:11:03,137 --> 00:11:05,931 TOWERS ABOVE THEM. 196 00:11:05,931 --> 00:11:08,758 TO REACH SUCH LOFTY HEIGHTS, 197 00:11:08,758 --> 00:11:10,586 THE FLEA NEEDS MORE FIREPOWER 198 00:11:10,586 --> 00:11:14,689 THAN THEIR LEG MUSCLES ALONE CAN PROVIDE. 199 00:11:14,689 --> 00:11:17,241 SO THEY HAVE A SECRET SUPERPOWER -- 200 00:11:17,241 --> 00:11:23,620 AN EXTRA STORE OF ELASTIC ENERGY AND A PROTEIN CALLED RESILIN. 201 00:11:23,620 --> 00:11:25,517 UNLEASHING THIS ENERGY STORE 202 00:11:25,517 --> 00:11:29,172 FORCES THE FLEA'S BENT LEGS TO STRAIGHTEN SUDDENLY, 203 00:11:29,172 --> 00:11:31,103 LAUNCHING IT INTO THE AIR. 204 00:11:33,206 --> 00:11:34,896 THIS KING OF SPRING CAN LEAP 205 00:11:34,896 --> 00:11:37,896 UP TO 200 TIMES ITS OWN BODY LENGTH. 206 00:11:37,896 --> 00:11:41,896 THAT'S LIKE A HUMAN JUMPING TO THE TOP OF THE EIFFEL TOWER. 207 00:11:41,896 --> 00:11:45,896 OF COURSE, WE'D NEED AN ELEVATOR TO GET BACK DOWN AGAIN. 208 00:11:50,724 --> 00:11:53,000 COMING UP, HOW CAN SEA TURTLES 209 00:11:53,000 --> 00:11:55,241 LOCATE THE EXACT SPOT THEY HATCHED 210 00:11:55,241 --> 00:11:58,724 AFTER MORE THAN 20 YEARS AT SEA? 211 00:11:58,724 --> 00:12:03,000 AND THE SECRET OF THE BEETLES THAT CAN BREATHE UNDERWATER. 212 00:12:13,068 --> 00:12:17,241 Narrator: SEA TURTLES TRAVEL THOUSANDS OF MILES ACROSS OCEANS, 213 00:12:17,241 --> 00:12:21,310 RETURNING AFTER 20 YEARS TO THE EXACT SPOT WHERE THEY WERE BORN 214 00:12:21,310 --> 00:12:25,241 IN TIME TO LAY THEIR OWN EGGS THERE. 215 00:12:25,241 --> 00:12:28,586 THAT'S LIKE A PERSON GOING BACK TO THE CITY OF HER BIRTH 216 00:12:28,586 --> 00:12:31,206 AND TRYING TO FIND THE HOSPITAL SHE WAS BORN IN 217 00:12:31,206 --> 00:12:35,517 WITH NO ONE TO ASK AND NO SMART PHONE TO HELP. 218 00:12:35,517 --> 00:12:38,172 SO HOW DO THESE GUYS DO IT? 219 00:12:38,172 --> 00:12:41,793 HOW DO THE SEA TURTLES FIND THEIR WAY HOME? 220 00:12:44,172 --> 00:12:46,724 SEA TURTLES SPEND PRETTY MUCH THEIR ENTIRE LIVES -- 221 00:12:46,724 --> 00:12:50,206 80 YEARS OR MORE -- AT SEA, 222 00:12:50,206 --> 00:12:53,103 AND SATELLITE TAGGING OF ATLANTIC SEA TURTLES 223 00:12:53,103 --> 00:12:56,517 HAS REVEALED WHERE THEY'VE BEEN GOING. 224 00:12:56,517 --> 00:13:00,586 THEY SWIM IN A GIANT LOOP FROM FLORIDA TO WEST AFRICA 225 00:13:00,586 --> 00:13:03,275 THEN WEST TOWARD SOUTH AMERICA 226 00:13:03,275 --> 00:13:06,517 BEFORE HEADING BACK TO THE WATERS OF THE SUNSHINE STATE 227 00:13:06,517 --> 00:13:08,862 TO MATE AND LAY EGGS. 228 00:13:11,137 --> 00:13:15,206 THEY CONTINUOUSLY SWIM THIS 12,000 MILE ROUND TRIP. 229 00:13:18,000 --> 00:13:20,827 WHEN IT'S TIME TO NEST THE FEMALES SOMEHOW KNOW 230 00:13:20,827 --> 00:13:25,310 THE PRECISE LOCATION OF THE EXACT SPOT WHERE THEY WERE BORN 231 00:13:25,310 --> 00:13:27,103 EVEN THOUGH IT COULD HAVE BEEN 20 YEARS 232 00:13:27,103 --> 00:13:29,586 SINCE SHE WAS LAST THERE. 233 00:13:29,586 --> 00:13:31,137 THEY MAKE THIS INCREDIBLE JOURNEY 234 00:13:31,137 --> 00:13:33,172 TO PASS ON TO THEIR HATCHLINGS 235 00:13:33,172 --> 00:13:36,448 THEIR INHERITED IMMUNITY FROM THE PARASITES AND DISEASES 236 00:13:36,448 --> 00:13:38,379 ON THAT PARTICULAR BEACH. 237 00:13:41,689 --> 00:13:44,655 BIOLOGIST KEN LOHMANN HAS BEEN TRYING TO DISCOVER 238 00:13:44,655 --> 00:13:48,517 THE SECRET OF THE SEA TURTLES' NAVIGATIONAL POWERS. 239 00:13:48,517 --> 00:13:53,413 SEA TURTLES, IN EFFECT, HAVE AN IN-BUILT GPS SYSTEM. 240 00:13:53,413 --> 00:13:55,413 Narrator: SCIENTISTS BELIEVE THAT SEA TURTLES 241 00:13:55,413 --> 00:13:58,758 ARE SOMEHOW READING THE EARTH'S MAGNETIC FIELD, 242 00:13:58,758 --> 00:14:01,482 THE SAME FORCE THAT DIRECTS A COMPASS. 243 00:14:03,931 --> 00:14:05,206 TO FIND OUT HOW, 244 00:14:05,206 --> 00:14:08,724 KEN'S CREATED A MINIATURE OCEAN IN HIS LAB 245 00:14:08,724 --> 00:14:10,344 AND ENLISTED THE HELP OF OSCAR, 246 00:14:10,344 --> 00:14:14,310 A THREE-MONTH-OLD HATCHLING BORN ON A BEACH IN FLORIDA. 247 00:14:14,310 --> 00:14:18,448 I'M PLACING THE TURTLE INTO A SOFT CLOTH HARNESS. 248 00:14:18,448 --> 00:14:21,275 THIS WILL ALLOW IT TO SWIM IN PLACE 249 00:14:21,275 --> 00:14:23,689 INSIDE THE MAGNETIC COIL SYSTEM. 250 00:14:26,517 --> 00:14:28,965 Narrator: OSCAR'S SWIMSUIT IS TIED TO A ROD 251 00:14:28,965 --> 00:14:33,344 WHICH IS SUSPENDED ABOVE THE TINY OCEAN. 252 00:14:33,344 --> 00:14:35,793 THE WATER, REPRESENTING THE ATLANTIC OCEAN, 253 00:14:35,793 --> 00:14:37,034 IS SURROUNDED BY 254 00:14:37,034 --> 00:14:39,862 A COMPUTER-CONTROLLED MAGNETIC-COIL SYSTEM, 255 00:14:39,862 --> 00:14:43,000 WHICH IS RECREATING THE EARTH'S MAGNETIC FIELDS. 256 00:14:45,862 --> 00:14:49,034 BY VARYING THE STRENGTH AND DIRECTION OF THE CURRENTS, 257 00:14:49,034 --> 00:14:51,758 KEN CAN SIMULATE THE ELECTROMAGNETIC SIGNATURE 258 00:14:51,758 --> 00:14:55,448 OF DIFFERENT LOCATIONS AROUND THE PLANET. 259 00:14:55,448 --> 00:14:57,448 Lohmann: THE FLAGS INSIDE THE COIL 260 00:14:57,448 --> 00:14:59,896 REPRESENT DIFFERENT PARTS OF THE WORLD. 261 00:14:59,896 --> 00:15:03,275 WE'RE GOING TO TRY TO TRICK THE TURTLES INTO THINKING 262 00:15:03,275 --> 00:15:05,862 THAT THEY'RE AT THOSE LOCATIONS BY EXPOSING THEM 263 00:15:05,862 --> 00:15:09,310 TO THE MAGNETIC FIELDS THAT EXIST THERE. 264 00:15:09,310 --> 00:15:12,448 Narrator: FIRST KEN TYPES IN THE ELECTROMAGNETIC SIGNATURE 265 00:15:12,448 --> 00:15:13,862 FOR THE FLORIDA BEACH 266 00:15:13,862 --> 00:15:16,965 WHERE OSCAR THE HATCHLING WAS BORN. 267 00:15:16,965 --> 00:15:20,344 AND INCREDIBLY, JUST AS IF HE WERE OUT IN THE ATLANTIC, 268 00:15:20,344 --> 00:15:23,482 OSCAR RESPONDS BY TURNING HIS BACK ON FLORIDA 269 00:15:23,482 --> 00:15:26,275 AND HEADS TOWARD WHAT HE THINKS IS AFRICA. 270 00:15:26,275 --> 00:15:28,344 Lohmann: WE'RE NOW GOING TO TRY TO TRICK THE TURTLE 271 00:15:28,344 --> 00:15:30,241 INTO THINKING THAT IT'S IN SENEGAL 272 00:15:30,241 --> 00:15:32,241 BY EXPOSING IT TO THE MAGNETIC FIELD 273 00:15:32,241 --> 00:15:34,793 THAT EXISTS AT THAT LOCATION. 274 00:15:34,793 --> 00:15:38,137 Narrator: OSCAR NOW BELIEVES HE'S IN SENEGAL. 275 00:15:38,137 --> 00:15:41,344 SO HE ADJUSTS HIS DIRECTION TO THE SOUTHWEST 276 00:15:41,344 --> 00:15:44,827 AS IF HE'S CONTINUING HIS MIGRATION TOWARD BRAZIL. 277 00:15:47,103 --> 00:15:49,241 IN THE WILD, IT WOULD TAKE A YEAR FOR A TURTLE 278 00:15:49,241 --> 00:15:51,275 TO REACH SOUTH AMERICA. 279 00:15:51,275 --> 00:15:54,827 OSCAR GETS THERE IN 45 SECONDS. 280 00:15:54,827 --> 00:15:57,758 KEN RESETS THE ELECTROMAGNETIC FIELD, 281 00:15:57,758 --> 00:16:01,931 AND OSCAR NOW BELIEVES HE'S OFF THE COAST OF BRAZIL. 282 00:16:01,931 --> 00:16:05,862 HE IMMEDIATELY CHANGES DIRECTION AND SWIMS NORTHWEST 283 00:16:05,862 --> 00:16:08,448 AS IF HEADING BACK UP TOWARD FLORIDA. 284 00:16:08,448 --> 00:16:10,551 Lohmann: THESE ARE TRULY ASTONISHING RESULTS. 285 00:16:10,551 --> 00:16:13,482 THESE ARE TURTLES THAT HAVE NEVER BEFORE BEEN IN THE OCEAN. 286 00:16:13,482 --> 00:16:14,827 BUT DESPITE THAT, 287 00:16:14,827 --> 00:16:17,379 THE FIRST TIME THEY ENCOUNTER THESE MAGNETIC FIELDS 288 00:16:17,379 --> 00:16:22,482 FROM DISTANT LOCATIONS, THEY KNOW WHAT DIRECTION TO GO. 289 00:16:22,482 --> 00:16:25,206 Narrator: KEN TESTED OVER 100 BABY TURTLES 290 00:16:25,206 --> 00:16:28,448 ALL WITH THE SAME RESULTS. 291 00:16:28,448 --> 00:16:30,793 HIS EXPERIMENT REVEALED SEA TURTLES ARE BORN 292 00:16:30,793 --> 00:16:34,068 WITH A PRE-PROGRAMMED BLUEPRINT OF THE DIFFERENT LOCATIONS 293 00:16:34,068 --> 00:16:37,379 ON THEIR EPIC MIGRATORY ROUTE. 294 00:16:37,379 --> 00:16:41,103 AND EACH LOCATION IS RECOGNIZED BY A DIFFERENT STRENGTH 295 00:16:41,103 --> 00:16:45,551 AND DIRECTION OF ELECTROMAGNETIC FIELD LIKE A MAGNETIC MARKER, 296 00:16:45,551 --> 00:16:51,724 BUT HOW DO TURTLES READ AND INTERPRET THESE INVISIBLE SIGNS? 297 00:16:51,724 --> 00:16:54,275 RECENTLY, SCIENTISTS HAVE DISCOVERED THAT SEA TURTLES 298 00:16:54,275 --> 00:16:59,137 HAVE TINY PARTICLES IN THEIR BRAINS CALLED MAGNETITE. 299 00:16:59,137 --> 00:17:02,586 THESE MAGNETIC PARTICLES DETECT THE SMALLEST VARIATIONS 300 00:17:02,586 --> 00:17:04,793 IN MAGNETIC FIELD STRENGTH, 301 00:17:04,793 --> 00:17:06,931 ALLOWING THE TURTLE TO PHYSICALLY FEEL 302 00:17:06,931 --> 00:17:10,413 WHETHER THEY'RE HEADING NORTH, SOUTH, EAST, OR WEST. 303 00:17:13,724 --> 00:17:18,103 Lohmann: IN EFFECT, THE TURTLES ARE USING THESE REGIONAL MAGNETIC FIELDS 304 00:17:18,103 --> 00:17:21,379 AS A KIND OF SYSTEM OF NAVIGATIONAL MARKERS 305 00:17:21,379 --> 00:17:22,551 OUT IN THE OPEN OCEAN, 306 00:17:22,551 --> 00:17:26,931 AND A TURTLE, THEREFORE, IS NEVER LOST. 307 00:17:26,931 --> 00:17:28,793 Narrator: OVER THOUSANDS OF YEARS, 308 00:17:28,793 --> 00:17:30,931 THE LOCATIONS OF DESIRABLE PLACES 309 00:17:30,931 --> 00:17:34,793 HAVE BEEN HARDWIRED INTO TURTLES. 310 00:17:34,793 --> 00:17:36,206 WHICH IS WHY THEY'RE ABLE TO RETURN 311 00:17:36,206 --> 00:17:40,551 TO THEIR EXACT BIRTHPLACE 20 YEARS AFTER LEAVING IT. 312 00:17:40,551 --> 00:17:46,103 ♪♪ 313 00:17:46,103 --> 00:17:47,551 COMING UP, 314 00:17:47,551 --> 00:17:50,965 HOW AIR-BREATHING BEETLES CONQUER THE DEPTHS. 315 00:18:00,379 --> 00:18:05,172 Narrator: THEY'RE FOUND ON THE HIGHEST, COLDEST PEAKS... 316 00:18:05,172 --> 00:18:09,275 THE MOST PARCHED, SCORCHED DESERTS... 317 00:18:09,275 --> 00:18:13,724 AND EVERYWHERE IN BETWEEN. 318 00:18:13,724 --> 00:18:17,000 IN FACT, ONE IN EVERY FOUR ANIMAL SPECIES 319 00:18:17,000 --> 00:18:21,172 ON THE SURFACE OF THE EARTH IS A BEETLE. 320 00:18:21,172 --> 00:18:23,172 AND DESPITE BEING A LAND INSECT, 321 00:18:23,172 --> 00:18:25,000 THIS SUPER SUCCESSFUL CRITTER 322 00:18:25,000 --> 00:18:27,655 HAS MANAGED TO CONQUER THE DEPTHS, TOO. 323 00:18:30,241 --> 00:18:33,965 BUT HOW DO BEETLES BREATHE UNDERWATER? 324 00:18:37,034 --> 00:18:39,448 THE ONE-INCH LONG GREAT DIVING BEETLE'S 325 00:18:39,448 --> 00:18:43,655 FAVORITE FOOD OF TADPOLES, NEWTS, AND OTHER WATER INSECTS 326 00:18:43,655 --> 00:18:46,413 LURKS AT THE BOTTOM OF THIS POND. 327 00:18:48,551 --> 00:18:51,448 SO THE AIR-BREATHING BEETLE HAS TO FIGURE OUT A WAY 328 00:18:51,448 --> 00:18:54,827 TO STAY ALIVE WHILE HUNTING UNDERWATER. 329 00:18:56,896 --> 00:19:00,137 ON LAND, HOLLOW TUBES HIDDEN UNDERNEATH THE WINGS 330 00:19:00,137 --> 00:19:04,724 CALLED SPIRACLES CARRY AIR INSIDE THE BUG'S BODY, 331 00:19:04,724 --> 00:19:08,068 BUT DIVING COULD CAUSE THESE TUBES TO FILL WITH WATER 332 00:19:08,068 --> 00:19:09,689 DROWNING THE BEETLE. 333 00:19:12,172 --> 00:19:15,344 SO THE BEETLE PROTECTS THE OPENINGS OF THE SPIRACLES 334 00:19:15,344 --> 00:19:18,172 WITH A BIG OXYGEN-RICH BUBBLE OF AIR 335 00:19:18,172 --> 00:19:22,862 TRAPPED BENEATH ITS PROTECTIVE WING CASING. 336 00:19:22,862 --> 00:19:27,482 UNFORTUNATELY, THE BUBBLE MAKES THE BEETLE FLOAT LIKE A BALLOON, 337 00:19:27,482 --> 00:19:28,793 SO THE DIVING BEETLE 338 00:19:28,793 --> 00:19:31,068 HAS TO FIGHT AGAINST THE BUBBLE'S BUOYANCY 339 00:19:31,068 --> 00:19:33,137 WHENEVER IT DIVES. 340 00:19:35,448 --> 00:19:38,758 AND THAT MAKES DIVING TRICKY. 341 00:19:38,758 --> 00:19:41,724 THE EFFORT NEEDED TO REACH THE BOTTOM OF THE POND 342 00:19:41,724 --> 00:19:43,586 USES UP MOST OF THE OXYGEN 343 00:19:43,586 --> 00:19:47,379 IN THE BUG'S AIR-BUBBLE AIR TANK. 344 00:19:47,379 --> 00:19:49,758 TO REFUEL, THE GREAT DIVING BEETLE 345 00:19:49,758 --> 00:19:54,137 DOES SOMETHING THAT APPEARS TO BE SUICIDAL. 346 00:19:54,137 --> 00:19:55,931 PRESSING UP WITH THE ABDOMEN, 347 00:19:55,931 --> 00:20:00,620 THE BEETLE PUSHES OUT MOST OF THE AIR BUBBLE. 348 00:20:00,620 --> 00:20:03,068 THIS IS A CRITICAL OPERATION. 349 00:20:03,068 --> 00:20:05,965 IF THE BEETLE LOSES ITS AIR TANK, 350 00:20:05,965 --> 00:20:10,758 THE BUG RUSHES BACK TO THE SAFETY OF THE SURFACE. 351 00:20:10,758 --> 00:20:13,413 BUT THE BEETLES THAT CAN CONTROL THE BUBBLE 352 00:20:13,413 --> 00:20:17,724 CAN STAY SUBMERGED FOR HOURS. 353 00:20:17,724 --> 00:20:20,862 BECAUSE OUT IN THE OPEN, THE BUBBLE ABSORBS OXYGEN 354 00:20:20,862 --> 00:20:23,000 DISSOLVED IN THE POND WATER, 355 00:20:23,000 --> 00:20:26,965 NATURALLY REFUELING ITSELF. 356 00:20:26,965 --> 00:20:29,310 AFTER REFUELING FOR LESS THAN A MINUTE. 357 00:20:29,310 --> 00:20:32,586 THE GREAT DIVING BEETLE SUCKS THE BUBBLE BACK IN. 358 00:20:35,965 --> 00:20:41,275 NOW THE BUG CAN GET ON WITH WHAT IT CAME DOWN HERE FOR -- 359 00:20:41,275 --> 00:20:45,379 FEASTING ON THE POND'S UNDERWATER BOUNTY. 360 00:20:45,379 --> 00:20:47,379 YUM. 28463

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