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.
02:09To be continued...
02:11To be continued...
02:11To be continued...
02:27The
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.
08:20anfมcasaur.
08:22JF GlueĂ
08:22And Osterick, AUSIN.
08:2815
08:29The 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 shot.
09:36Hesperonis 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.
10:37Furelled 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 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, 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.
12:13Long ago, their ancestors were scarce and gathered.
12:16But hadrosaws 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.
12:39They are in the safety of the kresh.
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, so she's constantly leaving to go find food.
13:36And when moms are away, little ones will play.
13:47Feeding in this bird-like way.
14:05With the wingspan of a fighter jet, pterosaurs are now bigger than ever, and creches are
14:17the perfect hunting crowns, 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 fierce 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.
16:26Because 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.
17:10It's here in the foothills below.
17:15And this is how to learn to help.
17:17We know that the dinosaurs are making any impact.
17:30Pachycephalosaurus, using their outrageously thick skulls to duel for supremacy.
17:46And alongside them, a dinosaur with even more impressive headgear, Triceratops.
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.
18:59The latest and greatest of the armored warriors.
19:06Six meters long and highly territorial.
19:15Ankylosaurus, Magnaventress.
19:26He's on patrol for intruders.
19:31Bold enough to breach his borders.
19:42His tank-like torso is covered in dozens of thick, bony plates.
19:54And what's more, he has a powerful new weapon.
20:04A club-like tail, weighing half a ton, that he can use to take on whatever stalks these forests.
20:19He senses something.
20:23The matter has moved.
20:51His
20:51His borders have been breached by the worst possible intruder of all.
21:12A Tyrannosaurus Rex.
21:41A Tyrannosaurus Rex, owner of the quartz frost and cool moon,
21:53Let's go.
22:40Ankylosaurus versus T-Rex.
22:53An evolutionary stalemate.
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.
23:32Intelligence.
23:33Oh.
23:34Oh.
23:42Oh.
23:51Oh.
23:54Oh.
23:55Oh.
24:04Oh.
24:06Oh.
24:10Oh.
24:11Oh.
24:13Oh.
24:14T-Rex is one of the most fearsome predators of all time.
24:22And to remain at the top of her game,
24:27she 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
25:08with an assortment of lumps and bumps.
25:25Even for T-Rex, it's quite a drag.
25:41Even for T-Rex, it's quite a drag.
26:03Finally, her journey's end.
26:17And the reason she's gone through all this effort...
26:21... is...
26:23... and fell to the right.
26:34Five hungry hatchlings.
26:50a ferocious killer yes but 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
27:36could 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
27:57hiding 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 and ever more formidable
28:33in time they would triumph not just on land
28:40but in the sea
28:42and 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
29:26the asteroid now hurtling towards earth at 50 times the speed of sound
29:34will finally have its date with destiny
29:39the other way
29:39and so
29:42Let's go.
30:12It smashes into the ocean off the coast of Mexico with the power of a billion atomic bombs. Temperatures are
30:26hot enough to vaporize the seabed, along with every living thing for hundreds of kilometers.
30:44Far away, in the foothills of the Rockies, these great dinosaurs have no idea what's about to hit them.
31:16The largest earthquakes in history.
31:28But 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, suffocating it with ash, shrouding it in darkness.
32:53The cloud is so hot.
32:56The cloud is so hot.
32:57The cloud is so hot.
32:58The cloud is so hot.
32:59The cloud is so hot.
33:00The cloud is so hot.
33:02The cloud is so hot.
33:02The cloud is so hot.
33:03The cloud is so hot.
33:03The cloud is so hot.
33:04The cloud is so hot.
33:04The cloud is so hot.
33:04The cloud is so hot.
33:05The cloud is so hot.
33:06The cloud is so hot.
33:07The cloud is so hot.
33:08The cloud is so hot.
33:32The few still standing at the end of the day.
33:39Are in a nightmare, choking in the gloom.
34:11By nightfall, the death toll for the dinosaurs is catastrophic.
34:48Starved of the sun's rays, the death toll for the sun.
34:49An 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 die 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.
37:09It is.
37:10I don't know.
37:40The reign of the dinosaurs has finally come to an end.
38:16But 66 million years later, the dinosaurs are rising again.
38:30This time, at our hands.
38:41Today, their fossils stand as monuments to a lost world.
38:48But more than that, they are the keys that unlock the secrets of the dinosaur story.
38:59Today, our 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.
40:27Alongside us.
40:31They are the last remaining link.
40:35To a long lost kingdom.
40:40That was the age of the dinosaurs.
40:46Of course.
41:10Thank you very much.
41:16It's a test.
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