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00:10One hundred and twenty-five million years ago, winter rages across the north.
00:26Entire species have been pushed to the brink.
00:40Even the largest dinosaurs are unable to endure this cold.
00:52Like these sauropods migrating south.
01:04Wreda came early this year and caught them off guard.
01:19With hundreds of kilometers ahead of them, this time it will be an especially harsh journey.
01:33But the bitter cold is not the only danger in this frozen land.
01:41There is a much greater threat here in these woods.
02:06Euteranus, the Snow King.
02:13An early relative of T-Rex.
02:20With a thick, insulating coat of feathers, he's perfectly adapted for life in a world this cold.
02:35But his feathers also serve a more sinister purpose.
02:46An early relative of T-Rex.
02:47Camouflage.
02:49The ultimate weapon for an ambush hunter.
02:53Camouflage.
02:56Camouflage.
03:07Camouflage.
03:11T-Rex.
03:17Peelace.
03:18Camouflage.
03:21Camouflage.
03:22Cathraft.
03:23I don't know.
03:53In a savage, ever-changing world, some will rise and some will fall.
04:06But through it all, the dinosaurs will expand their empire and advance relentlessly to seize Earth's final frontiers.
04:32I don't know.
04:32I don't know.
04:42I don't know.
04:46I don't know.
05:00I don't know.
05:02I don't know.
05:03I don't know.
05:07I don't know.
05:08I don't know.
05:09I don't know.
05:10I don't know.
05:11I don't know.
05:16I don't know.
05:17I don't know.
05:19I don't know.
05:19I don't know.
05:20I don't know.
05:23I don't know.
05:24I don't know.
05:47I don't know.
05:48There's a new age for life on Earth.
05:52An age of extremes.
05:56New worlds are forming that will give rise to the most famous dinosaurs of all time.
06:11The North is still gripped by cold.
06:15But not for much longer.
06:23Earth's most violent forces are stirring once again.
06:33Volcanoes seed and fume.
06:39Warming the planet.
06:52But some will pay a price for this warmer world.
06:57.
07:45As global temperatures continue to rise, the snow and ice all but disappear.
08:00Huge meltwater rivers tear through the land.
08:11This thawing of the north is expanding the dinosaur's empire even further.
08:20And in surprising new ways.
08:30In this fresh, fertile landscape, sauropods no longer need to migrate.
08:39But it's also a new world for one of the dinosaur's oldest rivals.
08:48The pterosaurs.
08:51They are now bigger and badder than ever.
09:01Including Grey Draco, the ghost dragon.
09:13But he's an intruder here.
09:21Because these trees are the home of longipteryx.
09:28A new kind of dinosaur.
09:31Less than 20 centimeters tall.
09:35But highly territorial.
09:38Especially during nesting season.
09:55They're also equipped to take on the pterosaurs.
10:03Now they, too, can fly.
10:16In a previous era, flying dinosaurs like Ancyonis could only glide.
10:25Now they're able to flap their wings and maneuver with precision to strike at their enemies.
10:43They're fast and fearless.
10:58It only gets worse for the tiring pterosaur.
11:04Because longipteryx are distant cousins of Eutyranus, the Snow King.
11:12They're armed with the teeth and claws of their clan.
11:28After ruling the skies since the Triassic,
11:33Pterosaurs are now being matched by the dinosaurs.
11:46But as the dinosaurs fight to expand their empire into the air,
11:53an even greater revolution lies ahead.
12:06Not in the mountains, or the skies, or the oceans.
12:13The biggest twist in Earth's tale is unfolding quietly.
12:21Almost in secret.
12:27Seven million years later, this new force is slowly rewriting the dinosaur story.
12:50This is one of the first flowers this forest has ever seen.
12:55One.
12:56Just one.
12:59One.
12:59In a vast and diverse new generation of plants.
13:07Beetles.
13:08And they will become a phenomenon with the help of a close ally.
13:21Beetles.
13:23They carry pollen from one flower to the next.
13:35Nature's most reliable delivery service.
13:45Helping these new plants spread far and wide across the globe.
13:57Transforming the dinosaur's empire.
14:08Transforming the dinosaur.
14:12But this new generation of plants has a dark side.
14:19It's a dark side.
14:22It's a dark side.
14:25It's a dark side.
14:26While they need to attract pollinators, many are also evolved to repel herbivores.
14:37With spines, thorns, and poisons.
14:50Nature's defensive weapons.
14:58This green revolution changes everything for the plant-eating dinosaurs.
15:09Including the great stegosaurs.
15:21They are herd animals by nature.
15:25But this young stegosaur, barely two years old, is all alone.
15:39She is the last of her herd.
15:54To eat these tougher new plants requires mouth that can chew food in a way her primitive jaw cannot.
16:11She's starving.
16:27These once great herbivores are unable to adapt to this new plant.
16:32The new world.
16:41It's one reason why their 50 million year existence will come to an end.
16:50Extinction.
16:50Extinction.
16:52Extinction.
16:56Extinction.
16:58Extinction.
16:59Seitahulation. But
16:59in the wake of the stegosaur's demise, a new era will emerge.
17:11over the next 15 million years these new plants evolve and diversify
17:19spreading across the planet and ever further into the dinosaurs empire
17:36the green revolution now covers the globe and not just the land but the water as well
17:53even providing cover and food for underwater explorers
18:04like ankylosaurs
18:26this bathing beauty
18:29is a different kind of dinosaur
18:39he's a plant eater like the stegosaurs but a fancier one much fancier
18:54because unlike the stegosaurs his advanced jaw can crush food
19:02in a way that makes eating any kind of plant easy
19:09it's the perfect adaptation
19:21he wants to take full advantage of all this great kingdom has to offer
19:40it's a long trek
19:46but the journey is worth it
20:07this is the one place where he can truly be himself
20:22his passion
20:24his singing
20:33he even has special hollows in his snout
20:36that amplify his song
20:44so it can be heard far and wide
21:13and it's the one place to be used
21:18so it's not just the one place where he can do the most
21:31A female has answered his call.
21:37It's time to charm her with his deep, sultry humming.
21:49Then, he shows her his stylish armor.
22:04It's all very persuasive.
22:27Their fancy attire does have some drawbacks, mind you.
22:35On the whole, though, heavy armor and an improved jaw are setting them up for success.
22:50But what no dinosaur could possibly know is that their empire has been gradually shrinking.
23:04Hidden below the waves, this world, once ruled by dinosaurs,
23:15is now completely out of their reach.
23:25And there's a reason.
23:32At the very bottom of the ocean, a slow, imperceptible shift reshaping the planet.
23:51The seabed is fracturing from an endless progression of eruptions.
24:25Earth's tectonic plates are shifting.
24:30Breaking apart the ocean floor, lifting it higher over millions of years.
24:42The water above has nowhere else to go but up.
24:49By the middle of the Cretaceous sea levels reach their highest point in history.
24:57Over 200 meters higher than they are today.
25:18The rising oceans repaint the map of the world, erasing entire land masses.
25:30The continent of Europe is reduced to a giant archipelago that includes the Isle of Hatzig.
25:45A world where isolation and evolution have created a kind of neverland for the dinosaurs.
25:55A world where normal rules don't apply.
26:04This is the home of Magyarosaurus, a sauropod.
26:15And, like other sauropods, he uses his long neck to reach the highest vegetation.
26:33The thing is, this vegetation is only two meters tall.
26:41Which makes Magyarosaurus about the size of a pony.
27:02On Hatzig, where there's limited space and food, sometimes smaller is better.
27:27But unlike Magyarosaurus, for predators, bigger is still better.
27:49As tall as a giraffe, one of the largest pterosaurs to ever live.
28:00As tall as a giraffe, one of the largest pterosaurs to ever live.
28:10She's flown to this island to feed on dinosaurs.
28:16She's flown to this island to feed on dinosaurs.
28:25The youngest member of the herd gets separated.
28:36But it won't be an easy catch.
28:41Unlike his giant cousins, he's right on his feet.
29:12But being this small, he can't see the other.
29:24They found a safe hiding spot, perfect for their size.
30:12They found a safe hiding spot, and they found a safe hiding spot, and they found a safe hiding spot.
30:45There is a safe hiding spot, and they found a safe hiding spot, and they found a safe hiding spot.
31:12The tiny dinosaurs, trapped on an island.
31:17There's nowhere else to go.
31:31But in a world so divided by the ocean, evolution takes different turns in different places.
31:49The sea levels are close to the highest they've ever been, creating a water world that no dinosaur has dared
32:10to enter.
32:19But that's about to change.
32:35Lurking in this mangrove swamp is a carnivore that has specially evolved to take on the final frontier.
32:56A dinosaur pioneer.
33:12Spinosaurus.
33:19The largest predator to ever walk the Earth.
33:29At 15 meters long, she's bigger than a school bus.
33:41The forest provides plenty of prey.
33:48But another reason she's gotten this big is because of where she goes to escape the gloom of the swamp.
34:14Here, the high sea levels have turned the oceans into a new hunting ground for the dinosaurs.
34:23Where bigger is definitely better.
34:53Spinosaurus.
34:54The universe is adapted to a planet that is now mostly ocean.
35:01And in this age, some of the largest prey is here in the water.
35:23Sharks.
35:29In a flat-out chase between a shark and a giant dog-paddling dinosaur,
35:35the shark will always win.
35:42But there's more to Spinosaurus than meets the eye.
35:53Dinosaurs aren't just becoming bigger.
35:57Some are cunning, too.
36:01She's going to make the sharks come to her.
36:15Her snout is wired with sensors that can detect the slightest movement.
36:25She's going to make the sharks.
36:26Now, all she needs to do...
36:30...is keep completely still.
36:48The best hunters are the patient ones.
36:55And her patience is starting to pay off.
37:02The best hunters are the patient ones.
37:06They want to make the sharks.
37:07The blood in the water is drawing the sharks closer.
37:12The sharks of the sharks.
37:12The sharks are getting closer to the sharks.
37:15The sharks are the ones who were the ones who are fully isolated.
37:24The sharks of the sharks are still plummeting throat.
37:32And the Sharks are the ones who are too few targets.
37:53She doesn't move.
38:00She knows how this game is played.
38:23Brains and brawn, a killer combination.
38:30That is finally letting the dinosaurs get a foothold in the ocean.
38:45Their reach is now global and extends to the very ends of the earth.
38:57To what will one day be Antarctica.
39:11While Spinosaurus is stalking the shallow seas and the tropics, the world's southernmost
39:19landmass is not the frozen wilderness we know today.
39:26It's a green, flourishing Eden.
39:36Where even in the dark, evolution is lighting the way.
39:51And thriving in the darkness are the dinosaurs.
40:09By this stage in the late Cretaceous, their empire is so vast that they now dominate every continent
40:19on Earth.
40:29And yet, while their reign is global, and their rule almost unchallenged, their story will take a dark turn.
40:56To be continued...
40:58To be continued...
41:26To be continued...
41:29To be continued...
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