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
01:22of 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.
01:58ANT THE END
02:02THE END
02:27And the night of the terrace has made it so much more rare than this whitney.
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.
05:04Not 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 and clumsy and has tiny teeth.
05:44Not exactly the traits of a ferocious hunter.
05:49But 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, he's able to swim far out the sea to access feeding grounds that were
06:29previously 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 ninety-four needle-sharp teeth snatch fish with ease.
07:37But as an air breather,
07:41he'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.
08:28The apex predators of these seas.
08:33The apex predators of these seas.
08:42Hesparonis must get back to the shore.
08:49But the Mosasaur moves with frightening speed.
08:57Luckily, Hesparonis is much more agile.
09:07But he's exhausted, which gives the Mosasaur one last shot.
09:36Asperonis is a true survivor, venturing 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.
10:37Furilled by a warm, stable climate, the dinosaur's dominance here is unrivaled.
10:53The great soror ponds are thriving among the tall trees, as they have since the dawn of the Jurassic.
11:08But down below, there has been a revolution.
11:18A female handersaw.
11:20Handersaw.
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 hadrosaws 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.
12:40They're in the safety of the creche, a sprawling nursery for hundreds of young hadrosaurs.
12:51including her 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.
13:28Feeding in this bird-like way takes a lot of meals.
13:30Feedingomos are worth of animals.
13:30So...
13:31she'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 than ever.
14:15And creches are the perfect hunting grounds, where unguarded nests are the easiest pickings.
14:43Despite 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 fear's instinct to protect their young is central to the Hadrosaur's 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 that the dinosaurs are making an impact.
17:27The pachycephalosaurus.
17:32Using their outrageously thick skulls...
17:37To do them for supremacy.
17:46And alongside them, a dinosaur with even more impressive headgear.
18:00Triceratops.
18:10She may look like a rhinoceros, but she's twice the size of one.
18:19And armed with spear-like horns over one meter in length.
18:32Triceratops and Pachycephalosaurus have impressive weapons.
18:40Yet there are some here that are even more armed and dangerous.
18:58Under the cover of darkness, the latest and greatest of the armored warriors.
19:06Six meters long and highly territorial.
19:15Ankylosaurus, Magnaventress.
19:25He's on patrol for intruders.
19:29Bold enough to breach his borders.
19:41His tank-like torso is covered in dozens of thick, bony plates.
19:53And what's more, he has a powerful new weapon.
20:03A club-like tail, weighing half a ton,
20:08that he can use to take on whatever stalks these forests.
20:18He senses something.
20:21He senses something.
20:50His borders have been breached.
20:55By the worst possible intruder of all.
21:10A Tyrannosaurus rex.
21:29We're trying to fill the ground,
21:32I think they can.
21:32We'll support you.
21:33We'll be able to save that one more.
21:34This is a side door either.
21:34We're going to save the epidemiology.
21:34We'll be able to save the next door.
21:35We'll keep track the space on the left.
21:35We'll keep track the floor.
21:36And we're going to save the next door.
21:43We'll be able to save the course.
21:46Let's go.
22:39Ankylosaurus versus T-Rex.
22:52An evolutionary stalemate.
22:55Millions of the years in the making.
23:18But in this arms race,
23:22there's one thing that does set these dinosaurs apart.
23:30Intelligence.
23:31Intelligence.
23:31Oh.
23:33Oh.
23:46Oh.
23:50Oh.
23:52Oh.
24:13T-Rex is one of the most fearsome predators of all time.
24:21And to remain at the top of her game,
24:26she must eat the equivalent of 200 steaks every day.
24:33And yet, so far, she hasn't eaten a single bite.
24:42That's because she has special plans for this takeout meal.
24:53Ankylosaurus is no light snack.
25:04Six tons of muscle and bone with an assortment of lumps and bumps.
25:24Even for T-Rex, it's quite a drag.
25:28I'm going to be a bug.
25:30What?
25:42I'm going to be a bug.
25:58Let's go.
26:04Finally, her journey's end, and the reason she's gone through all this effort
26:33...five hungry hatchlings, a ferocious killer, yes, but also a devoted
27:14mother, she will ensure her little ones are well fed, to give them the very best start
27:27in life.
27:32Something their distant ancestors could only dream of.
27:41Far back in the Triassic, tiny Marasuchus hatched into hell.
27:49These dinosaurs in the making, forced to live in the shadows, hiding from the ruling reptiles.
28:02But when fate intervened, they turned catastrophe into opportunity.
28:14And began their monumental rise.
28:20Growing bigger, stronger, and ever more formidable.
28:32In time, they would triumph, not just on land, but in the sea and the sky.
28:46After 160 million years, the dinosaurs are now so dominant, nothing on earth can stand in their way.
29:05But something not of this earth will.
29:11Because as this family's journey is just getting started, another journey is approaching its end.
29:26The asteroid, now hurtling towards earth at 50 times the speed of sound, will finally have its date with destiny.
29:50The Space Station
29:52The Space Station
29:57The Space Station
30:11It smashes into the ocean off the coast of Mexico
30:16With the power of a billion atomic bombs
30:23Temperatures are hot enough to vaporize the seabed
30:29Along with every living thing for hundreds of kilometers
30:42Far away in the foothills of the Rockies
30:46These great dinosaurs have no idea what's about to hit them
31:14The largest earthquakes in history
31:27But the worst is yet to come
31:33An enormous wall of superheated debris explodes outward
31:56The dinosaurs caught beneath this death cloud
32:01Are entombed
32:06Their world is so hot
32:08It literally bursts into flames
32:20Even the toughest armor
32:22Is no protection
32:34The cloud quickly engulfs the entire planet
32:39Suffocating it with ash
32:43Shrouding it in darkness
32:52It is worth it
32:53It is worth it
32:57You should do it
32:58You should do it
32:59Nothing
33:00You should do it
33:00Nothing
33:00You should do it
33:00You should reckonayı
33:01Vaticano Run
33:01In
33:01nor
33:01Kill
33:01us Il
33:01Near
33:02Hoo
33:14Your
33:31The few, still standing at the end of the day, are in a nightmare, choking in the gloom.
34:10By nightfall, the death tolls.
34:15For the dinosaurs, it's catastrophic.
34:48In the days, an impact winter descends on the earth.
34:59Global temperature is dropped by 25 degrees Celsius.
35:07Conditions too cold for almost any dinosaur to withstand.
35:26Giant sauropods laid to rest in the cinders of the buried trees that made them so tall.
35:51In their crowded colonies, those who lived together died together.
36:07Protective mothers cannot shield their young from their freezing temperatures.
36:19The punishing cold has also taken its toll on the most famous dinosaur of all.
36:35The tyrant king has fallen.
37:00Even the mighty tyrannosaurus rex will not survive this.
37:12The tyrant king has fallen.
37:14The tyrant king has fallen.
37:38The rain of the dinosaurs has finally come to an end.
38:14But
38:1666 million years later,
38:21the dinosaurs are rising again,
38:29this time at our hands.
38:40Today, their fossils stand as monuments to a lost
38:46world.
38:47But more than that,
38:50they are the keys that unlock the secrets
38:54of the dinosaur story.
38:58Our understanding of their lives is now greater than ever.
39:05From their very first moments to their very last.
39:13And the revelation that on Earth's darkest day,
39:18not all dinosaurs died.
39:23Some were small enough to find shelter from the apocalypse.
39:32And survive,
39:34even to this day.
39:39The flying dinosaurs,
39:41we now call the birds.
39:49And the clues to their past are hiding in plain sight.
40:16The remarkable journey that started 235 million years ago,
40:24the world continues alongside us.
40:30They are the last remaining link
40:34to a long lost kingdom
40:38that was the age of the dinosaurs.
40:45They are the last few years
40:45for our ownforms.
40:48What was the second story of our country?
41:00What did you do?
41:00What did you do?
41:03What did you do?
41:15It was the last time you told us.
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