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.
01:58The moon was yours.
02:11The moon was the most consecutive弱 précis.
02:13The moon was the one who was the most Eternal Jedi's history.
02:15Eidre is like a list of corpses from the stars.
02:16The moon has made a beautiful night or the sun.
02:23A live chi sioux, the moon has made a big star.
03:43The high sea levels have split North America in two, creating endless coastlines, hundreds
04:01of 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.
05:49But 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 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.
08:12Limited andюдаurers.
08:26In the wild.
08:41Otis-
08:42Hesperonis must get back to the shore.
08:49But the Mosasaur moves with frightening speed.
08:57Luckily, Hesperonis is much more agile.
09:08But he's exhausted.
09:12Which gives the Mosasaur one last shot.
09:36Hesperonis is a true survivor.
09:41Venturing further into the ocean than any dinosaur ever has.
09:49But these waters are treacherous.
09:51Even for the best swimmers.
10:03Despite 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 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.
11:21A 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.
11:39Because nothing can stop a mother on a mission.
11:45And that mission is to feed her family.
11:52Who 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.
12:25The 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 creche.
12:43A sprawling nursery for hundreds of young hadrosaurs.
12:51Including her own.
12:58At six months old, they have insatiable appetites.
13:03And will eat almost anything she brings them.
13:11Anything.
13:17I'd like to trust her.
13:18More now.
13:19More now.
13:21More now.
13:21More now.
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 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 are 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.
16:25Because 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.
17:11It's here, in the foothills below, that the dinosaurs are making an impact.
17:27The pachycephalosaurus.
17:30Pachycephalosaurus.
17:31Using their outrageously thick skulls.
17:37To duel 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.
18:33Triceratops 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, Magnaventris.
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.
20:21And...
20:35To the left ofatz Они T Misla,州.
20:40To the right to the south...
20:43We're not gonna need a Sc......
20:45So close to the right to un hechoσ ieCHPou Robinson,
20:50hoes chime lêners.
20:51This is a beggar.
20:51His borders have been breached by the worst possible intruder of all.
21:12A Tyrannosaurus Rex.
21:30He's going there...
21:33He's going there...
21:48There's a big lake...
21:50When I see this, he's going to change the values of the bottom of the Earth...
21:51...and it'surers of the sky.
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.
24:00Intelligence.
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. And yet, so far, she hasn't
24:38eaten a single bite. That's because she has special plans for this take-out meal.
24:53But ankylosaurus is no light snack. Six tons of muscle and bone with an assortment of lumps
25:11and bumps.
25:25Even for T-Rex, it's quite a drag.
25:29T-Rex, it's quite a drag.
25:58T-Rex, it'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.
26:51A 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.
27:34Something 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,
27:57hiding from the ruling reptiles.
28:03But when fate intervened,
28:05they turned catastrophe into opportunity
28:15and began their monumental rise.
28:22Growing bigger, stronger, and ever more formidable.
28:34In time, they would triumph, not just on land, but in the sea and the sky.
28:47After 160 million years, the dinosaurs are now so dominant,
28:56nothing on earth can stand in their way.
29:06But something not of this earth will.
29:12Because as this family's journey is just getting started,
29:18another journey is approaching its end.
29:27The asteroid, now hurtling towards earth at 50 times the speed of sound,
29:34will finally have its date with destiny.
30:09The asteroid is so Grande's味's producción,
30:09and a man of tears,
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.
32:59Shrouding it in darkness.
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, choking in the gloom.
34:16For the dinosaurs, is catastrophic.
34:49Today, an impact winter descends on the Earth.
35:00Global temperatures drop by 25 degrees Celsius, conditions too cold for almost any dinosaur
35:13to 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.
37:08It is.
37:29It is.
37:32It is.
37:35It is.
37:37It is.
37:38It is.
37:39It is.
37:40It is.
37:47It is.
37:47It is.
37:48It is.
37:49It is.
37:59It is.
38:09It is.
38:12It is.
38:12It is.
38:12It is.
38:13It is.
38:17It is.
38:17It is.
38:22It is.
38:31It is.
38:32at our hands.
38:42Today, their fossils stand as monuments to a lost world.
38:48But more than that,
38:51they are the keys that unlock the secrets
38:55of the dinosaur story.
38:59Our understanding of their lives
39:02is now greater than ever.
39:06From their very first moments
39:09to their very last.
39:15And the revelation
39:17that on Earth's darkest day,
39:20not all dinosaurs died.
39:25Some were small enough to find shelter
39:28from the apocalypse.
39:33And survive
39:34even to this day.
39:40The flying dinosaurs
39:42we now call
39:44the birds.
39:50And the clues to their past
39:53are hiding in plain sight.
40:17The remarkable journey
40:19that started 235 million years ago
40:24continues alongside us.
40:31They are the last remaining link
40:35to a long-lost kingdom
40:40that was
40:43the age
40:45of the dinosaurs.
41:13and the stars,
41:16and the new
41:16The universe
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