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(hyenas barking)
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(gentle music)
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During the Pleistocene Age
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much of the earth's land was covered
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by short, grass steps, including Africa.
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Huge herds of prey were laid bare
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for a host of hunters.
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(suspenseful music)
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The fearsome Sabertooth Megantereon
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with its enormous fangs lay in ambush.
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(suspenseful music)
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Two species of hyenas tested the herds
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for signs of weakness.
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(suspenseful music)
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Jagged toothed Homotherium, pack hunting Sabertooths,
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were rampant across the world.
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From Africa to the Americas.
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(suspenseful music)
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They were after something big.
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Really big.
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Like a young, straight tusked elephant.
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(suspenseful music)
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(elephant wailing)
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For millions of years, the Sabertooths and hyenas
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have been the world's top land predators.
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But new forces threaten the old order
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with skills the planet had never seen before.
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Big cats.
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(suspenseful music)
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Every species of Sabertooth vanished.
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Almost all the big cats survived.
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Why them?
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What's their story?
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Which unique adaptations gave the big cats the edge
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in this battle for survival?
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We go back in time to when lions
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were just beginning their ascent
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to discover how they conquered the world
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and how the tiger became
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the real king of the jungle.
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(suspenseful music)
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1.8 million years ago,
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there was a newcomer on the scene.
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A predator with completely different tactics
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to anything that had gone before.
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A hunter that brought new abilities
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to a competitive world.
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The lion.
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It's body was designed for power and acceleration
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with huge muscles on his haunches.
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The main competition for lions at the time
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were the cat-like Sabertooths.
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Their power was front loaded with massive neck muscles
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to drive formidable canines into prey.
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Megantereon was smaller than a male lion
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but with those teeth,
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was a dangerous adversary.
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Homotherium was the same size as the lion
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although it's serrated fangs were shorter,
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it too was a force to be reckoned with.
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These extinct animals are commonly called cats.
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But they separated from the cats we know today
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millions of years ago and are actually quite different.
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in the Pleistocene, all three species shared these plains
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but lions outlived the others and went on
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to dominate the globe.
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For more clues as to what gave them the edge
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in this world of deadly predators,
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we can look at the behavior of modern lions.
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Lions are the most social of all cats.
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(purring)
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They can live in large prides of up to 35
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including adult males,
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related females and their cubs.
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(gentle music)
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Close physical contact strengthens bonds
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within the pride
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and makes them smell the same.
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Together, they can share the rearing of cubs,
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kills and defense against predators.
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(suspenseful music)
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This teamwork was perhaps one ability
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that helped lions survive alongside
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their prehistoric rivals.
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The social Homotherium and hyenas.
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So how did the lion gain a competitive advantage?
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Lions today are almost completely nocturnal
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as they most probably were in the past.
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And it's their night hunting
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which perhaps holds the key to their survival
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into the present day.
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At dusk, lion prides head out onto the plains
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led by the most experienced females.
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With specialist filming techniques,
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we can see what's going on after dark.
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Infrared light and heat sensitive cameras
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reveal rarely seen behavior.
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(suspenseful music)
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These lions may look as if they're out for a stroll,
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but they're hunting.
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Alert to every sound.
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(suspenseful music)
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Their knowledge of the terrain
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and highly tuned senses will be key
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in helping them pinpoint their prey.
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They'll need to catch something bigger than a gazelle
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to feed the whole pride.
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Not this big.
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When hippos are angry, they're very dangerous
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and could easily kill a lion.
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(suspenseful music)
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Wildebeest are what they're after.
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On dark nights, they huddle together for safety.
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They don't make a sound.
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The lions can't hear them
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and they're too far away to see them.
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But they can smell them.
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(suspenseful music)
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The pride spreads out and encircles the herd.
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Two sisters team up.
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(suspenseful music)
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They're completely focused and in sync.
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(suspenseful music)
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They separate and flank the Wildebeest
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who are completely unaware of their presence.
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Without infrared light or heat sensitive cameras,
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this lioness's countershaded body
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is extremely hard to see.
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From where the Wildebeest are sitting,
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they have no chance of seeing her at all.
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To humanize, only the stars would be visible.
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Lion eyes are eight times more sensitive than our own.
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This is dark.
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The kind of hunting lions are designed for.
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One lioness takes the wing.
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The other silently moves right into the middle
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of the herd.
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During the day on open plains,
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they'd never get this close.
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(suspenseful music)
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The winger gets the herd moving.
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(suspenseful music)
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The one in the center bides her time.
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From her low vantage point,
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she can see the animals clearly against the sky.
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Like most cats, lions have lots
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of very fast twitch muscles for short,
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sharp bursts of speed but are low on endurance.
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Timing is critical.
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(suspenseful music)
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That was a close call for the Wildebeest.
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The lions will continue
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for as long as it takes.
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(roaring)
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The matriarch lets the rest of the pride know
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it's time to regroup.
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(roaring)
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This is how a big pride stays together in the dark.
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The roar can be heard over eight kilometers away.
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(suspenseful music)
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They wait and smell the air.
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(suspenseful music)
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They've located another herd.
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(suspenseful music)
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Again, one lioness creates panic in the herd.
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But they're completely unaware of her accomplice.
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(suspenseful music)
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She uses her strong canines and vise-like grip
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to administer a suffocating bite
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to the Wildebeest's throat.
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By killing her prey silently,
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she's less likely to alert rival predators.
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Although one lioness brought down this 200 kilo Wildebeest,
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it was a group effort.
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During the Pleistocene,
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team tactics would have been crucial
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for defense against Sabertooths.
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Lions would have certainly come into conflict
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with the ferocious Megantereon.
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This Sabertooth with its long teeth
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could perhaps kill one lion.
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But not a pride.
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(suspenseful music)
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(growling)
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(suspenseful music)
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Taking on a pack of Homotherium
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would have been more of a challenge for lions.
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However, analysis of Homotherium's eyes
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and brain structure from fossil skulls
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suggests they were daytime hunters.
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Which is perhaps why lions chose the night
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for most of their hunting.
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(growling)
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For lions today,
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the night still offers no respite from another pack animal.
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Lion's ancient nemesis, the spotted hyena.
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(hyenas growling)
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They're aggravated.
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The lions have invaded their patch
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and chased the prey away.
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When the male lions aren't around,
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the hyena's, Africa's second largest carnivore,
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intimidate the lionesses.
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(hyenas laughing)
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The adult females do their best
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to keep the intruders at bay.
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But there are enough hyenas here
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to overpower them.
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They'll kill cubs if they get the chance.
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(suspenseful music)
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In the Pleistocene, hyenas would have been
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a serious threat to lions as they are now.
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It could be that both species
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needed to be social just to deal
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with each other.
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(suspenseful music)
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One of the males turns up.
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(suspenseful music)
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His brother provides back up.
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Male lions won't hesitate to try and kill a hyena.
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And the hyenas know it.
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If it wasn't for teamwork,
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the cubs might be dead.
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The pride can now feed in peace.
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Lions can eat as much as 30 kilos a night.
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But even the king of the beasts
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is willing to share his meal.
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The pride is in high spirits.
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(lions growling)
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(gentle music)
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(birds chirping)
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With its social nature and the ability
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to hunt at night, the lion was able
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to find its own niche alongside prehistoric competitors.
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Its first step in becoming the master of the plains
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that we know today.
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But even a pride can be overpowered.
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(suspenseful music)
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In times gone by, elephants would have lived in fear
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of Homotherium and developed an enduring hatred
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for large cat-like animals.
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(jungle music)
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(elephant roaring)
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Once there was several species of elephants
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roaming these plains, keeping the grasslands open.
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There's just one species left.
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A survivor of turbulent times.
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In the crucible of evolution that was
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the African plains of the past,
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the lion's next test was about to begin.
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There was another predator just emerging.
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Like the lion, it would change
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the history of the earth.
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And in the end, would challenge
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all big cats for supremacy.
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Homo erectus.
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The first species of human to hunt large prey.
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These early humans were implicated in wiping out
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at least three species of elephant in Africa
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and many other large mammals that were crucially
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the prey of Homotherium.
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In Africa, the age of the Sabertooths
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was coming to an end.
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Humans were replacing them.
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Yet lions managed to live alongside
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these early people.
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Being wary and nocturnal
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may well have helped them avoid conflict.
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Around 1.7 million years ago,
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early human hunters expanded their range
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outside Africa into Southern Europe and Asia.
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Almost a million years later,
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lions finally followed them, crossing the Sahara
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during a green spell.
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Europe and Asia became the lion's new home from home
276
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and soon they had spread from Spain
277
00:23:52,860 --> 00:23:54,503
all the way to Japan.
278
00:23:58,230 --> 00:24:01,180
Despite their neo global domination,
279
00:24:01,180 --> 00:24:02,990
there were large parts of South
280
00:24:02,990 --> 00:24:06,743
and East Asia that were out of bounds for lions.
281
00:24:12,200 --> 00:24:14,580
Lions may have ruled the plains
282
00:24:14,580 --> 00:24:17,153
but they were never the king of the jungle.
283
00:24:19,950 --> 00:24:22,723
That crown belongs to another cat.
284
00:24:26,470 --> 00:24:28,560
Weight for weight, it was as strong
285
00:24:28,560 --> 00:24:30,223
and powerful as a lion.
286
00:24:34,990 --> 00:24:37,403
While a pride could transit in the open,
287
00:24:39,910 --> 00:24:43,310
this solitary cat preferred to stay in cover
288
00:24:45,190 --> 00:24:48,513
in the forests and tall grasslands of Asia.
289
00:24:51,930 --> 00:24:54,153
This was the tiger.
290
00:25:00,454 --> 00:25:03,037
(gentle music)
291
00:25:03,994 --> 00:25:05,760
In the depths of the ice ages,
292
00:25:05,760 --> 00:25:08,160
the plains and frozen savannas
293
00:25:08,160 --> 00:25:10,083
were crowded with large mammals.
294
00:25:13,041 --> 00:25:16,440
(horses exhaling)
295
00:25:16,440 --> 00:25:21,440
Rhinos, mammoths, wizzant, and auros.
296
00:25:22,390 --> 00:25:26,310
Potential prey of both lions and tigers.
297
00:25:26,310 --> 00:25:29,093
All have defensive horns and tusks.
298
00:25:30,350 --> 00:25:32,460
Once used against Sabertooths
299
00:25:32,460 --> 00:25:35,263
were now needed against these two cats.
300
00:25:37,720 --> 00:25:39,730
With the Sabertooths gone,
301
00:25:39,730 --> 00:25:43,573
the lion and the tiger became Asia's top predators.
302
00:25:45,320 --> 00:25:48,573
One perfectly adapted to the open plains,
303
00:25:51,778 --> 00:25:55,217
and the other to forests and tall grasslands.
304
00:26:05,630 --> 00:26:09,640
Today, tigers are still found in these places
305
00:26:09,640 --> 00:26:12,000
but here, in the Russian far east,
306
00:26:12,000 --> 00:26:13,543
prey is now scarce.
307
00:26:14,820 --> 00:26:16,980
The huge herds have gone
308
00:26:16,980 --> 00:26:18,223
as has the lion.
309
00:26:19,290 --> 00:26:22,900
The tigers now have to wander vast distances
310
00:26:24,130 --> 00:26:25,523
in search of a meal.
311
00:26:33,830 --> 00:26:37,263
But when they see prey, they take no chances.
312
00:26:39,140 --> 00:26:42,363
The tiger is a master of stealth.
313
00:26:46,040 --> 00:26:49,400
Unlike the lion, it has more endurance muscle
314
00:26:49,400 --> 00:26:53,053
which means it can last longer in a chase.
315
00:26:54,048 --> 00:26:57,048
(suspenseful music)
316
00:27:11,200 --> 00:27:15,533
And when tigers catch something, they eat all of it.
317
00:27:16,500 --> 00:27:20,273
Putting away a fifth of their body weight in 24 hours.
318
00:27:23,400 --> 00:27:26,210
This stability to cope with feast and famine
319
00:27:26,210 --> 00:27:28,600
is a trait that all can't share
320
00:27:28,600 --> 00:27:31,770
and would have given tigers a competitive edge
321
00:27:31,770 --> 00:27:33,493
in the prehistoric world.
322
00:27:38,430 --> 00:27:41,110
Today, the Russian far east is at the edge
323
00:27:41,110 --> 00:27:43,780
of their modern range, but it's thought
324
00:27:43,780 --> 00:27:47,220
the tigers started life somewhere in China
325
00:27:47,220 --> 00:27:49,970
and by 1.6 million years ago,
326
00:27:49,970 --> 00:27:51,840
it had spread south into
327
00:27:51,840 --> 00:27:55,200
a now submerged place called Sundaland
328
00:27:55,200 --> 00:27:58,443
and on to the islands of Java and Sumatra.
329
00:28:00,210 --> 00:28:02,690
It went as far west as Turkey
330
00:28:02,690 --> 00:28:06,733
and to the far east all the way to Baringa and Japan.
331
00:28:08,450 --> 00:28:10,970
Asia was the tiger's heartland
332
00:28:11,987 --> 00:28:13,890
and vast waves of it
333
00:28:13,890 --> 00:28:16,583
were covered by tall grass savanna.
334
00:28:19,360 --> 00:28:22,270
There is a place at the edge of the Himalayas
335
00:28:22,270 --> 00:28:25,803
that closely resembles the tiger's prehistoric world.
336
00:28:27,510 --> 00:28:31,030
This landscape, known as the Terai,
337
00:28:31,030 --> 00:28:33,890
is home to the densest population of tigers
338
00:28:33,890 --> 00:28:34,973
in the world.
339
00:28:42,890 --> 00:28:45,513
It's a land of giants.
340
00:28:46,706 --> 00:28:49,289
(gentle music)
341
00:28:52,837 --> 00:28:55,600
(water splashing)
342
00:28:55,600 --> 00:28:58,063
Herds of elephants still roam here.
343
00:29:01,070 --> 00:29:03,083
The world's second largest rhino.
344
00:29:06,640 --> 00:29:08,433
The world's largest buffalo.
345
00:29:11,410 --> 00:29:13,193
And heaviest wild cattle.
346
00:29:14,690 --> 00:29:17,090
All equipped to defend themselves
347
00:29:17,090 --> 00:29:19,960
against the largest living cat.
348
00:29:19,960 --> 00:29:23,033
If they can see it, before it seems them.
349
00:29:30,870 --> 00:29:34,190
By looking at how modern tigers live here today,
350
00:29:34,190 --> 00:29:36,960
we can discover more about how they've managed
351
00:29:36,960 --> 00:29:38,310
to survive the Pleistocene.
352
00:29:44,441 --> 00:29:46,990
And even though there are many here,
353
00:29:46,990 --> 00:29:48,053
you wouldn't know it.
354
00:29:49,400 --> 00:29:52,090
The highly secretive Bengal tiger
355
00:29:52,090 --> 00:29:54,013
is perfectly camouflaged.
356
00:29:56,100 --> 00:29:58,640
Out of 40 species of wild cat,
357
00:29:58,640 --> 00:30:01,503
the tiger is the only one with stripes.
358
00:30:02,810 --> 00:30:05,410
Perhaps a unique adaptation for living
359
00:30:05,410 --> 00:30:07,253
in these tall grass lands.
360
00:30:09,743 --> 00:30:12,493
(birds chirping)
361
00:30:18,400 --> 00:30:22,273
Much of the wildlife here congregates around water.
362
00:30:29,303 --> 00:30:30,720
A place to drink.
363
00:30:32,707 --> 00:30:33,773
Feed.
364
00:30:36,730 --> 00:30:38,713
And cool down in the hot sun.
365
00:30:43,120 --> 00:30:46,220
The one horned rhino's folded skin
366
00:30:46,220 --> 00:30:48,660
over four centimeters thick
367
00:30:48,660 --> 00:30:49,933
helps it to keep cool.
368
00:30:50,870 --> 00:30:52,670
It may have also evolved as
369
00:30:52,670 --> 00:30:54,963
a defense against Sabertooths.
370
00:31:00,840 --> 00:31:03,343
The crocodile has thick skin too.
371
00:31:05,450 --> 00:31:08,570
But instead, this cold blooded predator
372
00:31:08,570 --> 00:31:11,903
basks on the banks to raise its body temperature.
373
00:31:16,010 --> 00:31:18,150
Cheeky smooth coated otters
374
00:31:18,150 --> 00:31:20,030
use their strength in numbers
375
00:31:21,040 --> 00:31:23,083
to pester this deadly reptile.
376
00:31:30,060 --> 00:31:33,773
Even the rhinos appear aggravated by the otters' antics.
377
00:31:36,792 --> 00:31:39,375
(gentle music)
378
00:31:47,284 --> 00:31:50,314
(birds chirping)
379
00:31:50,314 --> 00:31:53,314
(monkeys screaming)
380
00:31:54,921 --> 00:31:56,370
There's an air of nervousness
381
00:31:56,370 --> 00:31:58,563
when the tall predator makes an appearance.
382
00:32:02,571 --> 00:32:05,571
(suspenseful music)
383
00:32:17,180 --> 00:32:20,413
Only a young bull elephant seems unphased.
384
00:32:23,650 --> 00:32:26,650
(suspenseful music)
385
00:32:41,850 --> 00:32:44,680
Tigers also come here to drink and rest
386
00:32:44,680 --> 00:32:45,893
in the heat of the day.
387
00:32:49,980 --> 00:32:52,530
But they won't turn down the chance of a meal
388
00:32:52,530 --> 00:32:54,223
if something comes their way.
389
00:32:55,610 --> 00:32:58,133
An otter would make a tasty snack.
390
00:33:07,425 --> 00:33:09,425
These are much too wary.
391
00:33:14,270 --> 00:33:16,863
A mongoose shows less caution.
392
00:33:23,513 --> 00:33:26,513
(suspenseful music)
393
00:33:41,930 --> 00:33:44,980
Another tiger, possibly her sister,
394
00:33:44,980 --> 00:33:47,573
is keen to share the meager remains.
395
00:33:56,128 --> 00:33:58,961
(tigers growling)
396
00:34:02,280 --> 00:34:04,630
But there's clearly not enough for two of them.
397
00:34:08,680 --> 00:34:11,430
(tiger growling)
398
00:34:14,640 --> 00:34:16,883
She'll have to make her own kill.
399
00:34:21,920 --> 00:34:25,093
Tall grasslands are hard places to live in.
400
00:34:26,350 --> 00:34:28,790
With so many dangerous animals
401
00:34:28,790 --> 00:34:32,510
and so little viability, predator and prey
402
00:34:32,510 --> 00:34:34,433
have to be constantly vigilant.
403
00:34:37,100 --> 00:34:40,130
Tigers are able to travel around more easily
404
00:34:40,130 --> 00:34:42,540
by using paths that have been created
405
00:34:42,540 --> 00:34:44,343
by rhinos and elephants.
406
00:34:47,429 --> 00:34:50,012
(gentle music)
407
00:34:51,570 --> 00:34:54,130
From the air, you can see just how vast
408
00:34:54,130 --> 00:34:56,187
these networks of trails are.
409
00:35:04,260 --> 00:35:07,093
(birds squawking)
410
00:35:15,016 --> 00:35:17,290
(suspenseful music)
411
00:35:17,290 --> 00:35:19,960
Being surrounded by a wall of grass
412
00:35:19,960 --> 00:35:21,933
makes navigation difficult.
413
00:35:24,660 --> 00:35:26,680
But researchers tracking the movements
414
00:35:26,680 --> 00:35:29,730
of tigers realize they must have a mental map
415
00:35:29,730 --> 00:35:30,983
of their environment.
416
00:35:36,450 --> 00:35:39,360
This adult female has a home range
417
00:35:39,360 --> 00:35:41,853
of about 25 square kilometers.
418
00:35:44,840 --> 00:35:47,630
She'll know every feature within it
419
00:35:47,630 --> 00:35:50,330
and regularly scent mark trees and bushes
420
00:35:50,330 --> 00:35:53,693
to let others know this is her domain.
421
00:35:55,283 --> 00:35:58,283
(suspenseful music)
422
00:36:04,400 --> 00:36:06,320
She's just one of the females
423
00:36:06,320 --> 00:36:09,293
that live within this dominant males territory.
424
00:36:13,050 --> 00:36:15,550
The tigers in this part of the Terai
425
00:36:15,550 --> 00:36:17,160
live in high densities
426
00:36:20,520 --> 00:36:22,283
because of the abundance of prey.
427
00:36:29,200 --> 00:36:30,960
The fading light of dusk
428
00:36:30,960 --> 00:36:33,243
is a favorite time for tigers to hunt.
429
00:36:37,690 --> 00:36:41,250
These hefty Gawa, once the prey of Sabertooths
430
00:36:41,250 --> 00:36:43,123
are now on the tiger's menu.
431
00:36:45,260 --> 00:36:47,750
At five times this male's weight,
432
00:36:47,750 --> 00:36:50,423
it's hard to imagine how a tiger could take one on.
433
00:36:56,476 --> 00:36:59,476
(suspenseful music)
434
00:37:11,300 --> 00:37:13,620
But of all the cats, the tiger has
435
00:37:13,620 --> 00:37:16,299
the strength and power to bring one down
436
00:37:16,299 --> 00:37:18,193
with minimal struggle.
437
00:37:19,130 --> 00:37:22,293
Something a lion would find hard to do single handedly.
438
00:37:25,490 --> 00:37:28,640
This tall grassland habitat isn't a place
439
00:37:28,640 --> 00:37:31,393
a lion pride could live or hunt in either.
440
00:37:33,410 --> 00:37:35,950
But like the lion, it's possible the tiger
441
00:37:35,950 --> 00:37:39,210
became a night hunter to avoid competition
442
00:37:39,210 --> 00:37:43,300
from prehistoric predators like Sabertooths
443
00:37:43,300 --> 00:37:44,643
and early humans.
444
00:37:50,220 --> 00:37:53,213
Hunting at night is now the tiger's specialty.
445
00:37:57,760 --> 00:38:00,550
And with sophisticated night vision cameras,
446
00:38:00,550 --> 00:38:03,550
we're able to capture rare images of tigers
447
00:38:03,550 --> 00:38:05,263
that wouldn't normally be visible.
448
00:38:07,090 --> 00:38:10,990
This young female, around 2 1/2 years old,
449
00:38:10,990 --> 00:38:13,503
is on the cusp of becoming independent.
450
00:38:15,310 --> 00:38:17,260
She's still living within in the safety
451
00:38:17,260 --> 00:38:20,620
of her mother's territory and learning to perfect
452
00:38:20,620 --> 00:38:22,187
the skills of a hunter.
453
00:38:26,770 --> 00:38:29,070
She uses the well worn animal trails
454
00:38:29,070 --> 00:38:31,683
to move quickly and silently.
455
00:38:38,060 --> 00:38:40,253
Rhinos can smell where she's been.
456
00:38:53,410 --> 00:38:55,250
In the light of a full moon,
457
00:38:55,250 --> 00:38:58,543
the biggest challenge is to avoid being spotted.
458
00:38:59,638 --> 00:39:02,221
(deer barking)
459
00:39:03,300 --> 00:39:06,483
The deer favor grazing in the open areas.
460
00:39:09,030 --> 00:39:11,080
From our high vantage point,
461
00:39:11,080 --> 00:39:12,970
we can easily see them.
462
00:39:12,970 --> 00:39:15,750
But from eye level, even the thinnest grass
463
00:39:15,750 --> 00:39:17,683
obscures almost everything.
464
00:39:20,590 --> 00:39:24,023
Any glimpse of a tiger and the deer call.
465
00:39:25,013 --> 00:39:27,596
(deer barking)
466
00:39:31,010 --> 00:39:33,240
She knows she has no chance here.
467
00:39:35,434 --> 00:39:38,300
(suspenseful music)
468
00:39:38,300 --> 00:39:41,453
She stands her best chance on a starry night.
469
00:39:44,196 --> 00:39:46,779
(deer barking)
470
00:39:49,357 --> 00:39:51,860
Without the light of the moon,
471
00:39:51,860 --> 00:39:53,363
she has the upper hand.
472
00:39:55,240 --> 00:39:58,800
Now only infrared and thermal cameras
473
00:39:58,800 --> 00:40:01,203
allow us to see what happens.
474
00:40:07,711 --> 00:40:10,711
(suspenseful music)
475
00:40:11,810 --> 00:40:15,160
But the tiger will have to use all of her senses
476
00:40:15,160 --> 00:40:16,723
to gauge where the deer are.
477
00:40:18,270 --> 00:40:21,020
Relying on her hearing to track prey down
478
00:40:21,020 --> 00:40:21,933
until she's close.
479
00:40:25,622 --> 00:40:28,622
(suspenseful music)
480
00:40:32,190 --> 00:40:33,613
Wherever the deer go,
481
00:40:37,670 --> 00:40:39,053
the tiger follows.
482
00:40:41,365 --> 00:40:44,365
(suspenseful music)
483
00:40:46,380 --> 00:40:48,610
Crocodile infested rivers
484
00:40:48,610 --> 00:40:49,643
are no barrier.
485
00:40:51,453 --> 00:40:54,453
(suspenseful music)
486
00:41:00,600 --> 00:41:04,300
In the pitch black, the tiger has scent, sound,
487
00:41:04,300 --> 00:41:06,203
and her mental map to guide her.
488
00:41:08,585 --> 00:41:11,168
(gentle music)
489
00:41:19,061 --> 00:41:21,811
(birds chirping)
490
00:41:29,430 --> 00:41:32,010
These deer know this is tiger country
491
00:41:32,010 --> 00:41:33,823
and can never fully relax.
492
00:41:41,750 --> 00:41:44,167
She can't see far in the long grass
493
00:41:44,167 --> 00:41:46,840
so has to rely on her hearing,
494
00:41:46,840 --> 00:41:48,763
the most acute of her senses.
495
00:41:51,632 --> 00:41:54,215
(deer barking)
496
00:41:55,076 --> 00:41:57,730
(birds chirping)
497
00:41:57,730 --> 00:41:59,770
Her hearing is so sensitive
498
00:41:59,770 --> 00:42:01,970
that she can pick up the faintest echo
499
00:42:01,970 --> 00:42:03,553
of her own footsteps.
500
00:42:04,390 --> 00:42:06,920
It's possible she uses this information
501
00:42:06,920 --> 00:42:08,920
as a kind of echo location
502
00:42:08,920 --> 00:42:11,623
to gauge the distance of the objects around her.
503
00:42:15,560 --> 00:42:19,143
Her ears rotate to pick up the slightest sound.
504
00:42:33,230 --> 00:42:35,913
It's crucial she stay silent too.
505
00:42:39,197 --> 00:42:42,030
(grass crunching)
506
00:42:43,350 --> 00:42:44,500
One wrong move
507
00:42:45,490 --> 00:42:46,713
and her cover is blown.
508
00:42:47,781 --> 00:42:50,364
(deer barking)
509
00:42:59,960 --> 00:43:03,500
These rare images capture how the deer respond
510
00:43:03,500 --> 00:43:05,480
to the tiger's presence
511
00:43:05,480 --> 00:43:07,753
barking warning calls loud and clear.
512
00:43:09,588 --> 00:43:12,171
(deer barking)
513
00:43:22,961 --> 00:43:25,961
(suspenseful music)
514
00:43:27,770 --> 00:43:29,983
The tiger retreats into the long grass.
515
00:43:36,240 --> 00:43:38,263
She's completely invisible now.
516
00:43:40,120 --> 00:43:42,703
(gentle music)
517
00:43:47,740 --> 00:43:50,613
And waits for the animals to settle down.
518
00:44:04,310 --> 00:44:06,853
The tiger can hear some deer nearby.
519
00:44:08,592 --> 00:44:11,592
(suspenseful music)
520
00:44:23,692 --> 00:44:26,301
(animals screaming)
521
00:44:26,301 --> 00:44:28,280
(deer barking)
522
00:44:28,280 --> 00:44:31,280
(suspenseful music)
523
00:44:39,918 --> 00:44:42,501
(deer barking)
524
00:44:44,440 --> 00:44:46,923
This time, she won't go hungry.
525
00:44:48,061 --> 00:44:50,644
(deer barking)
526
00:44:56,638 --> 00:44:59,221
(gentle music)
527
00:45:05,200 --> 00:45:07,670
Tigers survived a series of extinctions
528
00:45:07,670 --> 00:45:10,140
during the Pleistocene that saw the demise
529
00:45:10,140 --> 00:45:13,700
of the Sabertooths and many other large animals,
530
00:45:13,700 --> 00:45:15,810
perhaps simply because they learned
531
00:45:15,810 --> 00:45:19,053
to hide from early humans and hunted at night.
532
00:45:25,600 --> 00:45:27,400
At the height of their power,
533
00:45:27,400 --> 00:45:29,900
several hundreds of thousands of tigers
534
00:45:29,900 --> 00:45:31,703
would have roamed across Asia.
535
00:45:34,637 --> 00:45:37,220
(upbeat music)
536
00:45:43,640 --> 00:45:46,210
But while the tiger was securing its place
537
00:45:46,210 --> 00:45:48,380
in Eastern and Southern Asia,
538
00:45:48,380 --> 00:45:52,093
lions were following the open plains northwards.
539
00:45:53,773 --> 00:45:56,356
(upbeat music)
540
00:45:57,340 --> 00:45:59,653
And cross the Bearing land bridge,
541
00:46:01,750 --> 00:46:05,550
by 340,000 years ago, they were spreading
542
00:46:05,550 --> 00:46:07,583
from North to South America.
543
00:46:09,801 --> 00:46:12,384
(gentle music)
544
00:46:16,760 --> 00:46:20,120
In the Americas, the lion came face-to-face
545
00:46:20,120 --> 00:46:23,633
with some old enemies, Homotherium.
546
00:46:24,600 --> 00:46:26,900
Although this Sabertooth had long gone
547
00:46:26,900 --> 00:46:31,100
from Africa and Asia, it was still thriving here
548
00:46:31,100 --> 00:46:33,833
and it lived alongside a monster Sabertooth.
549
00:46:35,320 --> 00:46:36,153
Smilodon.
550
00:46:39,763 --> 00:46:42,430
(lion growling)
551
00:46:43,300 --> 00:46:47,950
Twice the size of its extinct ancestor, Megantereon,
552
00:46:47,950 --> 00:46:49,823
and with even longer fangs,
553
00:46:52,250 --> 00:46:54,510
perhaps competition with Smilodon
554
00:46:54,510 --> 00:46:56,370
is why the American lion became
555
00:46:56,370 --> 00:46:58,520
the biggest big cat ever,
556
00:46:58,520 --> 00:47:00,973
weighting up to 400 kilos.
557
00:47:05,090 --> 00:47:09,150
Incredibly, these three terrifying species
558
00:47:09,150 --> 00:47:12,210
managed to co-exist for hundreds of thousands of years
559
00:47:14,470 --> 00:47:16,773
sharing the bounty of prey on offer.
560
00:47:20,814 --> 00:47:23,960
(upbeat music)
561
00:47:23,960 --> 00:47:26,480
Across the world, wherever the lion
562
00:47:26,480 --> 00:47:29,580
was surrounded by other powerful predators,
563
00:47:29,580 --> 00:47:32,000
it was its ability to hunt at night
564
00:47:32,000 --> 00:47:34,870
and strong social bonds that were key
565
00:47:34,870 --> 00:47:35,943
to its survival.
566
00:47:37,600 --> 00:47:40,183
(upbeat music)
567
00:47:43,400 --> 00:47:45,950
Now with the lion and tiger distributed
568
00:47:45,950 --> 00:47:47,491
across the globe,
569
00:47:47,491 --> 00:47:50,923
this really was the age of big cats.
570
00:47:52,727 --> 00:47:55,310
(upbeat music)
571
00:48:02,230 --> 00:48:04,633
But their reign would not last forever.
572
00:48:07,460 --> 00:48:09,790
Around 60,000 years ago,
573
00:48:09,790 --> 00:48:12,360
a new force emerged out of Africa
574
00:48:12,360 --> 00:48:13,713
and swept the globe.
575
00:48:15,680 --> 00:48:17,243
Homo sapiens.
576
00:48:20,760 --> 00:48:22,300
By the time these cave paintings
577
00:48:22,300 --> 00:48:25,110
of lions were made in Ice Age fronts,
578
00:48:25,110 --> 00:48:28,910
modern humans were just establishing their supremacy
579
00:48:28,910 --> 00:48:30,403
in the frozen north.
580
00:48:31,890 --> 00:48:33,650
Whatever the primal thoughts behind
581
00:48:33,650 --> 00:48:37,758
these striking images fear or even reverence,
582
00:48:37,758 --> 00:48:40,303
one thing seems certain:
583
00:48:42,210 --> 00:48:45,040
the lives of these two social predators
584
00:48:45,040 --> 00:48:49,410
have been interlinked for a very long time.
585
00:48:49,410 --> 00:48:51,993
(upbeat music)
586
00:48:53,260 --> 00:48:57,670
Today lions and tigers face an uncertain future
587
00:48:57,670 --> 00:48:59,493
in this human dominated era.
588
00:49:01,100 --> 00:49:03,433
(whistling)
589
00:49:05,900 --> 00:49:08,320
During the golden age of big cats,
590
00:49:08,320 --> 00:49:10,743
lions and tigers covered the globe.
591
00:49:12,820 --> 00:49:15,113
But this age has long gone.
592
00:49:16,560 --> 00:49:19,770
Now there are less than 20,000 lions
593
00:49:20,630 --> 00:49:23,203
and fewer than 4,000 tigers.
594
00:49:28,810 --> 00:49:31,030
The last remaining populations
595
00:49:31,030 --> 00:49:34,593
are mainly confined to national parks and reserves.
596
00:49:36,320 --> 00:49:39,460
If we want to share a future with big cats,
597
00:49:39,460 --> 00:49:41,763
they need prey and space to roam.
598
00:49:44,294 --> 00:49:46,877
(upbeat music)
599
00:49:50,850 --> 00:49:54,150
Areas like the Masai Mara and Serengeti
600
00:49:54,150 --> 00:49:56,543
are the lion's last strongholds.
601
00:49:57,590 --> 00:50:00,440
These rich, green pastures plump from
602
00:50:00,440 --> 00:50:01,970
the seasonal rains,
603
00:50:01,970 --> 00:50:04,503
have always attracted massive herds.
604
00:50:11,780 --> 00:50:15,230
During the rainy season, it's a time of plenty.
605
00:50:15,230 --> 00:50:17,930
A good start in life for the youngest members
606
00:50:17,930 --> 00:50:18,763
of the pride.
607
00:50:21,690 --> 00:50:23,560
They practice their hunting skills
608
00:50:23,560 --> 00:50:24,710
on anything that moves.
609
00:50:26,479 --> 00:50:29,062
(upbeat music)
610
00:50:40,780 --> 00:50:43,640
Like all big cats, they'll need to rely
611
00:50:43,640 --> 00:50:45,910
on every skill they possess
612
00:50:45,910 --> 00:50:48,283
to survive in this changing world.
613
00:50:50,299 --> 00:50:52,966
(upbeat music)
43805
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