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,
01:17sends 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.
02:14And the final chapter in the epic story of the Earth's history of the Earth's history of the Earth's history
02:18of the Earth's history of the Earth's history of the Earth's history of the Earth's history of the Earth's history
02:18of the Earth's history of the Earth's history of the Earth's history of the Earth's history of the Earth's history
02:19of the Earth's history of the Earth's history of the Earth's history of the Earth's history of the Earth's history
02:19of the Earth's history of the Earth's history of the Earth's history of the Earth's history of the Earth's history
02:20of the Earth's history of the Earth's history of the Earth's history of the Earth's history of the Earth's history
02:20of the Earth's history of the Earth's history of the Earth's history of the Earth's history of the Earth's history
02:21of the Earth's history of the Earth's history of the Earth's history of the Earth's history of the Earth's history
02:23of the Earth's history of the Earth's history of the Earth's history of the Earth's history of the Earth's history
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.
05:20But he is pretty much the opposite of his giant terrifying cousins.
05:35He is 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 is not confined to dry land.
06:04In fact, he is the most advanced aquatic dinosaur in history.
06:17Like some sort of prehistoric penguin.
06:22He is able to swim far out the sea to access feeding grounds.
06:27That 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 shark teeth snatch fish with ease.
07:38But as an air breather, he is still tied to the surface.
07:55And 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.
08:41The apex predators of these seas.
08:42The apex predators of these eggs.
08:44The apex predators of these shits.
08:58One core
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 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.
11:17A 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.
12:16Long ago, the great animals were too.
12:18Long ago, their head is so powerful, they're so powerful.
12:26Long ago, there's only a few years of resonance.
12:28Long ago, there's been a lot of thorns, including a lot of thorns in her head.
12:28High-to-school, high-to-class dinosaurs were born and more.
12:30Long ago, there were trees.
12:34Long ago, there are trees that were angels.
12:36Long ago, there are trees that were dying.
12:37Long ago, they're extremely high-to-class animals are nowhere-to-cast glass.
12:43A sprawling nursery for hundreds of young hadrosaurs, including 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.
13:30So, 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, pterosols are now bigger.
14:11Than ever.
14:15And creches are the perfect hunting grounds.
14:19Where 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.
15:35But the little ones aren't just crying in fear.
15:38They're calling for health.
15:53They're calling for health.
15:57the larger bees.
16:01This deer's instinct to protect their young.
16:07Is central to the hydrosaur's remarkable success.
16:13but other dinosaurs are taking defense to a whole new level because the arms race
16:22between predator and prey is escalating and this will give rise to the most iconic dinosaurs of all
16:39time this will take so long that the continent of North America will shift the land buckling up into
16:51the sky the Rocky Mountains it's here in the foothills below that the dinosaurs are making an impact
17:23it's careful the source using their outrageously thick skulls to do it for supremacy
17:41and alongside them a dinosaur with even more impressive headgear
17:55triceratops
18:05she may look like a rhinoceros but she's twice the size of one
18:14and armed with spear-like horns over one meter in length
18:27triceratops and pachycephalosaurus have impressive weapons
18:34yet there are some here that are even more armed and dangerous
18:53under the cover of darkness the latest and greatest of the armored warriors
19:21he's on patrol for intruders
19:26bold enough to breach his borders
19:37his tank-like torso is covered in dozens of thick bony plates
19:49and what's more he has a powerful new weapon
19:59a club-like tail weighing half a ton that he can use to take on whatever stalks these forests
20:14he sends us
20:16this is something
20:16he sends us something
20:17ah
20:18ah
20:19ah
20:19ah
20:20ah
20:21ah
20:46His borders have been breached.
20:50By the worst possible intruder of all.
21:07A Tyrannosaurus Rex.
21:09A Tyrannosaurus Rex.
21:24A Tyrannosaurus Rex.
21:38A Tyrannosaurus Rex.
21:41A Tyrannosaurus Rex.
21:56A Tyrannosaurus Rex.
21:58A Tyrannosaurus Rex.
22:06A Tyrannosaurus Rex.
22:33A Tyrannosaurus Rex.
22:38A Tyrannosaurus Rex.
22:45A Tyrannosaurus Rex.
22:48An evolutionary stalemate.
22:51Millions of years in the making.
22:53A Tyrannosaurus Rex.
23:43A Tyrannosaurus Rex.
24:09T-Rex is one of the most fearsome predators of all time.
24:17And to remain at the top of her game, she must eat the equivalent of 200 steaks every day.
24:30And yet, so far, she hasn't eaten a single bite.
24:38That's because she has special plans for this takeout meal.
24:48But ankylosaurus is no light snack.
25:00Six tons of muscle and bone with an assortment of lumps and bumps.
25:20Even for T-Rex, it's quite a drag.
25:24All right.
25:25All right.
25:26All right.
25:27All right.
25:30All right.
26:00Finally, her journey's end.
26:12And the reason she's gone through all this effort, five hungry hatchlings.
26:45A ferocious killer?
26:47Yes, but also a devoted mother.
27:11She will ensure her little ones are well fed to give them the very best start in life.
27:28Something their distant ancestors could only dream of.
27:37Far back in the Triassic, tiny Marasuchus hatched into hell.
28:13A monumental rise.
28:17Growing bigger, stronger, and ever more formidable.
28:29In time, they would triumph, not just on land, but in the sea and the sky.
28:42After 160 million years, the dinosaurs are now so dominant, nothing on earth can stand in their way.
29:01But something not of this earth will.
29:05No.
29:07Because as this family's journey is just getting started, another journey is approaching its end.
29:22The asteroid, now hurtling towards earth at 50 times the speed of sound, will finally have its date with destiny.
29:37The asteroid is now so much more than just on earth.
29:38The orb has its death.
29:48Are you from the orbit of the sea?
30:08It smashes into the ocean off the coast of Mexico with the power of a billion atomic
30:17bombs.
30:19Temperatures are hot enough to vaporize the seabed, along with every living thing for
30:28hundreds of kilometers, far away in the foothills of the Rockies.
30:44These great dinosaurs have no idea what's about to hit them.
31:11The largest earthquakes in history.
31:24But the worst is yet to come.
31:29An enormous wall of superheated debris explodes outward.
31:52The dinosaurs caught beneath this death cloud are entombed.
32:02Their world is so hot, it literally bursts into flames.
32:16Even the toughest armor is no protection.
32:30The cloud quickly engulfs the entire planet, suffocating it with ash, shrouding it in darkness.
33:10It's beautiful.
33:27The few still standing at the end of the day
33:33are in a nightmare, choking in the gloom.
34:06By nightfall, the death toll for the dinosaurs is catastrophic.
34:42Starved of the sun's rays, an impact winter descends on the earth.
34:55Global temperature is dropped by 25 degrees Celsius.
35:04Conditions too cold for almost any dinosaur to withstand.
35:22Giant sauropods laid to rest in the cinders of the very trees that made them so tall.
35:47In their crowded colonies, those who lived together died together.
36:03Protective mothers cannot shield their young from their freezing temperatures.
36:15The punishing cold has also taken its toll on the most famous dinosaur of all.
36:31The tyrant king has fallen.
36:56Even the mighty tyrannosaurus rex will not survive this.
37:09The End
37:10The End
37:10The End
37:17The End
37:34The reign of the dinosaurs has finally come to an end.
38:11But sixty-six million years later,
38:16the dinosaurs are rising again.
38:25This time, at our hands.
38:36Today, their fossils stand as monuments to a lost world.
38:43But more than that, they are the keys that unlock the secrets of the dinosaur story.
38:54Our understanding of their lives is now greater than ever.
39:00From their very first moments to their very last.
39:09And the revelation that on Earth's darkest day, not all dinosaurs died.
39:19Some were small enough to find shelter from the apocalypse.
39:28And survive even to this day.
39:35The flying dinosaurs we now call the birds.
39:45And the clues to their past are hiding in plain sight.
40:12The remarkable journey that started 235 million years ago continues.
40:22Alongside us.
40:26They are the last remaining link.
40:30To a long lost kingdom.
40:34That was the age of the dinosaurs.
40:41To a long lost.
40:58The
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