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00:15In the depths of space, a threat is looming.
00:22Trapped between the orbits of Jupiter and Mars,
00:28the asteroid belt.
00:32One and a half million chunks of ancient rock circling the Sun,
00:43drifting endlessly.
00:55But in a single moment of pure chance,
01:04one asteroid is thrown out of its orbit.
01:10A fleeting instant, millions of kilometers from Earth,
01:16sends it on a new trajectory towards the very center of our solar system.
01:34But its journey will come to a sudden and violent end,
01:41in one of the most catastrophic events in Earth's history.
01:50And the final chapter in the epic story of the dinosaurs.
02:00The End
02:02The End
02:03Come Falledull W生
04:00Hundreds of tropical islands and opportunity.
04:19But these islands are no paradise.
04:26They are home to a formidable predator.
04:34One of the fastest, most agile dinosaurs of its kind.
04:43North America's answer to the Spinosaurus.
05:00Just not in the way you would think.
05:02Not even remotely.
05:08This is Hesperonis.
05:12He is formidable.
05:15And he is fast.
05:19But he's pretty much the opposite of his giant terrifying cousins.
05:35He's awkward.
05:37And clumsy.
05:41And has tiny teeth.
05:44Not exactly the traits of a ferocious hunter.
05:50But what he does share with Spinosaurus is that he's not confined to dry land.
06:04In fact, he's the most advanced aquatic dinosaur in history.
06:17Like some sort of prehistoric penguin.
06:22He's able to swim far out the sea to access feeding grounds that were previously out of reach.
06:51This is the bounty of his new blue realm.
07:05Down here, his big clumsy feet become powerful propellers.
07:14And his 94 needle sharp teeth snatch fish with ease.
07:38But as an air breather, he's still tied to the surface.
07:56And the surface is not a safe place to linger.
08:03Because below, there are beasts.
08:09Twice the size of a killer whale.
08:12pilots mullsasaurs.
08:28The apex predators of the seas.
08:42Hesperonis must get back to the shore, but the Mosasaur moves with frightening speed.
08:56Luckily, Hesperonis is much more agile, but he's exhausted, which gives the Mosasaur one last
09:32shot.
09:36Hesperonis is a true survivor.
09:41Venturing further into the ocean than any dinosaur ever has.
09:49But these waters are treacherous, even for the best swimmers.
10:02Despite the dinosaur's success in the shadows, the Mosasaurs rule the waves.
10:19800 miles north, on land, it's a different story.
10:37Furelled by a warm, stable climate, the dinosaur's dominance here is unrivaled.
10:53The great sauropods are thriving among the tall trees, as they have since the dawn of the
11:01Jurassic.
11:08But down below, there has been a revolution.
11:18A female handersaw.
11:24While she may be dwarfed in present company, she's actually larger than an elephant.
11:34And she won't be held up by these giants, because nothing can stop a mother on a mission.
11:45And that mission is to feed her family, who are somewhere down there.
12:07Long ago, their cheek-stuffing ancestors were scarce and scattered.
12:16But hadrosaurs are now so successful, their herds are thousands strong.
12:26The greatest gatherings of dinosaurs the world has ever known.
12:33But this female's family isn't traveling with the herd.
12:39There in the safety of the creche, a sprawling nursery for hundreds of young hadrosaurs, including
12:51her own.
12:58At six months old, they have insatiable appetites, and will eat almost anything she brings them.
13:11Anything.
13:24Feeding in this bird-like way takes a lot of refills.
13:30So, she's constantly leaving to go find food.
13:36And when moms are away, little ones will play.
14:05With the wingspan of a fighter jet, pterosaurs are now bigger.
14:11Than ever.
14:15And creches are the perfect hunting grounds, where unguarded nests are the easiest pickings.
14:24Of course.
14:44Despite the threat from this towering monster, the mothers will defend their babies at all costs.
15:07But the giant pterosaur is determined to feed.
15:19The screams from the nest are like a dinner bell to the predator.
15:40But the little ones aren't just crying in fear.
15:45They're calling for help.
16:06This syruous instinct to protect their young, is central to the hadrosaurs remarkable success.
16:18but other dinosaurs are taking defense to a whole new level
16:25because the arms race between predator and prey is escalating
16:33and this will give rise to the most iconic dinosaurs of all time
16:45this will take so long that the continent of north america will shift
16:53the land buckling up into the sky
17:06the rocky mountains
17:10it's here in the foothills below
17:16that the dinosaurs are making an impact
17:29pachycephalosaurus
17:31using their outrageously thick skulls
17:37to duel for supremacy
17:46and alongside them
17:48a dinosaur with even more impressive headgear
18:00triceratops
18:22triceratops
18:33and pachycephalosaurus
18:35and pachycephalosaurus have impressive weapons
18:40yet there are some here
18:43that are even more armed and dangerous
18:58under the cover of darkness
19:00the latest and greatest of the armored warriors
19:13and pachycephalosaurus
19:16and pachycephalosaurus
19:17and pachycephalosaurus
19:27he's on patrol for intruders
19:44he's on patrol for intruders
19:57bold enough
19:57he has a powerful new weapon
20:04a club-like tail
20:06weighing half a ton
20:09that he can use to take on whatever stalks these forests
20:19he senses something
20:21he senses something
20:51his borders have been breached
20:55by the worst possible intruder of all
21:11a tyrannosaurus rex
21:14a tyrannosaurus rex
21:30Rsat
21:42D
21:43e
21:43you
21:44you
21:44you
21:45you
21:46Let's go.
22:40Ankylosaurus versus T-Rex.
22:54Ankylosaurus still mate.
22:56Millions of the years in the making.
23:19But in this arms race...
23:23There's one thing that does set these dinosaurs apart.
23:31Intelligence.
23:32Oh!
23:35Oh!
23:38Oh!
23:47Oh!
23:50Oh!
23:54Oh!
23:56Oh!
23:57Oh!
24:03Oh!
24:14T-Rex is one of the most fearsome predators of all time, and to remain at the top of
24:24her game, she must eat the equivalent of 200 steaks every day.
24:34And yet, so far, she hasn't eaten a single bite.
24:43That's because she has special plans for this takeout meal.
24:54But Ankylosaurus is no light snack.
25:05Six tons of muscle and bone with an assortment of lumps and bumps.
25:25Even for T-Rex, it's quite a drag.
25:57It's quite a drag.
26:04Finally, her journey's end.
26:17And the reason she's gone through all this effort...
26:34Five hungry hatchlings.
26:50A ferocious killer?
26:52Yes.
26:55But also, a devoted mother.
27:16She will ensure her little ones are well fed to give them the very best start in life.
27:33Something their distant ancestors could only dream of.
27:42Far back in the Triassic, tiny Marasuchus hatched into hell.
27:50These dinosaurs in the making, forced to live in the shadows…
27:57…hiding from the ruling reptiles.
28:03But when fate intervened
28:05They turned catastrophe
28:09Into opportunity
28:15And began their monumental rise
28:21Growing bigger, stronger
28:24And ever more formidable
28:33In time
28:36They would triumph
28:37Not just on land
28:40But in the sea
28:43And the sky
28:47After 160 million years
28:52The dinosaurs are now so dominant
28:56Nothing on earth
28:57Can stand in their way
29:06But something not of this earth
29:09Will
29:12Because as this family's journey
29:15Is just getting started
29:18Another journey
29:20Is approaching its end
29:27The asteroid
29:28Now hurtling towards earth
29:31At 50 times the speed of sound
29:35Will finally
29:36Have its date with destiny
29:40You
29:42Aự
30:07Anent
30:12It smashes into the ocean off the coast of Mexico
30:18with the power of a billion atomic bombs.
30:24Temperatures are hot enough to vaporize the seabed.
30:30Along with every living thing for hundreds of kilometers.
30:44Far away in the foothills of the Rockies,
30:48these great dinosaurs have no idea what's about to hit them.
31:16The largest earthquakes in history.
31:29But the worst is yet to come.
31:34An enormous wall of superheated debris explodes outward.
31:57The dinosaurs caught beneath this death cloud are entombed.
32:07Their world is so hot, it literally bursts into flames.
32:21Even the toughest armor is no protection.
32:35The cloud quickly engulfs the entire planet,
32:40suffocating it with ash,
32:44shrouding it in darkness.
33:14It's dangerous.
33:32The few, still standing at the end of the day, are in a nightmare, choking in the gloom.
34:14The few, still standing at the end of the day, are in a nightmare.
34:16For the dinosaurs, is catastrophic.
34:49In the days, an impact winter descends on the earth.
35:00Global temperatures drop by 25 degrees Celsius.
35:08Conditions too cold for almost any dinosaur to withstand.
35:27Giant sauropods laid to rest in the cinders of the buried trees that made them so tall.
35:52In their crowded colonies, those who lived together, died together.
36:08Protective mothers cannot shield their young from their freezing temperatures.
36:20The punishing cold has also taken its toll on the most famous dinosaur of all.
36:36The tyrant king has fallen.
37:01Even the mighty tyrannosaurus rex will not survive this.
37:13The tyrant king has fallen.
37:15The tyrant king has fallen.
37:39The tyrant king has fallen.
37:40The reign of the dinosaurs has finally come to an end.
38:07The tyrant king has fallen.
38:16The tyrant king has fallen.
38:17But 66 million years later, the dinosaurs are rising again.
38:25At 61 million years later...
38:29This time, at our hands.
38:37...at our hands.
38:41Today, their fossils stand as monuments to a lost world.
38:48But more than that...
38:51They are the keys that unlock the secrets of the dinosaur story.
38:59Our understanding of their lives is now greater than ever.
39:05From their very first moments to their very last.
39:14And the revelation that on Earth's darkest day, not all dinosaurs died.
39:24Some were small enough to find shelter from the apocalypse.
39:33And survive even to this day.
39:40The flying dinosaurs we now call the birds.
39:50And the clues to their past are hiding in plain sight.
40:17The remarkable journey that started 235 million years ago continues alongside us.
40:31They are the last remaining link to a long-lost kingdom that was the age of the dinosaurs.
40:46All right.
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