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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,
01:13millions of kilometers from Earth,
01:16sends it on a new trajectory
01:20towards 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.
01:58The Aram Gauze
02:00a
02:01a
02:08a
02:11a
02:13a
02:13a
03:55Creating endless coastlines, hundreds 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.
05:20But 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.
05:49But 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.
06:22He's able to swim far out the sea to access feeding grounds.
06:28That 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, and his 94-needle-shark teeth snatch fish with ease.
07:37But 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, twice the size of a killer whale.
08:28The apex predators of these seas.
08:42Hesperonis must get back to the shore.
08:49But the Mosasaur moves with frightening speed.
08:56Luckily, Hesperonis 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 Mosasaur's 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 sauer 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.
11:25While 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.
11:39Because nothing can stop a mother on a mission.
11:45And that mission is to feed her family.
11:52Who are somewhere...
11:55Down there.
12:07Long ago, their cheek-stuffing ancestors were scarce and scattered.
12:16But hadrosaurs are now so successful, their herds are thousands strong.
12:25The greatest gatherings of dinosaurs the world has ever known.
12:33But this female's family isn't traveling with the herd.
12:40There in the safety of the creche.
12:43A sprawling nursery for hundreds of young hadrosaurs.
12:48A sprawling nursery for hundreds of years, including her own.
12:58At six months old, they have insatiable appetites.
13:04And 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.
14:19Where unguarded nests are the easiest pickings.
14:44Despite the threat from this towering monster, the mothers will defend their babies at all costs.
14:52Despite the threat from this towering monster, the mothers will defend their babies at all costs.
15:07But the giant pterosaur is determined to feed.
15:13But the giant pterosaur is determined to feed.
15:23The giant pterosaur is determined to feed.
15:25And the giant pterosaur is determined to feed.
15:34Without the
15:34The giant pterosaur is determined to feed.
15:41So, the giant pterosaur is determined to feed them.
15:53From the percent of theÛ’-like wolves in the world's country.
16:06This deer's instinct to protect their young is central to the hydrosaur's remarkable success.
16:18But other dinosaurs are taking defense to a whole new level.
16:26Because 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.
17:11It's here in the foothills below.
17:16That the dinosaurs are making an impact.
17:29Pachycephalosaurus.
17:31Using their outrageously thick skulls.
17:37To do them for supremacy.
17:46And alongside them.
17:48A dinosaur with even more impressive headgear.
18:00Triceratops.
18:10She may look like a rhinoceros.
18:13But 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.
18:42That are even more armed and dangerous.
18:58Under the cover of darkness.
18:59Triceratops.
19:00The latest and greatest of the armored warriors.
19:06Six meters long.
19:09And highly territorial.
19:15Ankylosaurus.
19:17Magnaventris.
19:26He's on patrol for intruders.
19:30Bold enough.
19:32To breach his borders.
19:42His tank-like torso is covered.
19:45In dozens of thick, bony plates.
19:54And what's more.
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.
20:20He senses something.
20:21me.
20:23I have a quiet.
20:40Alright.
20:44Alright.
20:50I'm busy.
20:51I know I've never done it.
20:51His borders have been breached
20:55by the worst possible intruder of all.
21:12A Tyrannosaurus Rex.
21:22.
21:22.
21:23.
21:23.
21:23.
21:23.
21:30I don't know.
22:02I don't know.
22:24I don't know.
22:53I don't know.
22:53An evolutionary stalemate, millions of years in the making.
23:30Intelligence.
23:32Oh!
23:34Oh!
23:37Oh!
23:47Oh!
23:50Oh!
23:52Oh!
23:54Oh!
23:56Oh!
23:56Oh!
24:05Oh!
24:08Oh!
24:14T-Rex is one of the most fearsome predators of all time.
24:22And to remain at the top of her 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.
24:53But 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.
25:29Oh!
25:41Oh!
25:43Oh!
25:44Oh!
25:56Oh!
26:03Oh!
26:09Oh!
26:10Oh!
26:12Oh!
26:12Oh!
26:12Oh!
26:12Oh!
26:17And the reason she's gone through all this effort.
26:34Five hungry hatchlings.
26:50A ferocious killer? Yes.
26:55But also a devoted mother.
27:16She will ensure her little ones are well fed.
27:25To 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.
27:53Forced to live in the shadows.
27:57Hiding from the ruling reptiles.
28:03But when fate intervened.
28:07They turned catastrophe.
28:11Into opportunity.
28:15And began their monumental rise.
28:21Growing bigger, stronger, and ever more formidable.
28:33In time, they would triumph.
28:38Not 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 can stand in their way.
29:06But something not of this earth.
29:09Will.
29:12Because as this family's journey is just getting started.
29:18Another journey.
29:20Another journey.
29:20Is approaching its end.
29:27The asteroid.
29:29Now hurtling towards earth.
29:31At 50 times the speed of sound.
29:35Will finally.
29:37Have its date with destiny.
30:13It smashes into the ocean.
30:16Off the coast.
30:17The coast of Mexico.
30:19With the power.
30:20Of a billion atomic bombs.
30:24Temperatures are hot enough to vaporize the seabed.
30:31Along with every living thing.
30:33For hundreds of kilometers.
30:44Far away in the foothills of the Rockies.
30:49These great dinosaurs have no idea.
30:53What's about to hit them.
31:16The largest earthquakes in history.
31:29But the worst is yet to come.
31:35An enormous wall of superheated debris.
31:39Explodes outward.
31:57The dinosaurs.
32:00Caught beneath this death cloud.
32:03Are entombed.
32:07The world is so hot.
32:10It literally bursts into flames.
32:22Even the toughest armor.
32:24Is no protection.
32:35The cloud quickly engulfs the entire planet, suffocating it with ash, shrouding it in darkness.
33:08To be continued...
33:32The few still standing at the end of the day are in a nightmare, choking in the gloom.
34:11By nightfall, the death toll for the dinosaurs is catastrophic.
34:47Starved of the sun's rays, an impact winter descends on the earth.
35:00Global temperature is dropped by 25 degrees Celsius, conditions too cold for almost any
35:12dinosaur to withstand.
35:27Giant sauropods laid to rest in the cinders of the varied 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.
37:32The tyrant king has been on the east of the west.
37:39The reign of the dinosaurs has finally come to an end.
38:16But 66 million years later, the dinosaurs are rising again, this time at our hands.
38:41Today, their fossils stand as monuments to a lost world, but more than that, they are
38:52the 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.
40:26Alongside us.
40:31They are the last remaining link to a long lost kingdom that was the age of the dinosaurs.
40:46Of course.
40:47Of course.
40:55The ruins of theERS.
41:17They are the
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