1
00:00:06,464 --> 00:00:08,883
[mysterious music plays darkly]

2
00:00:15,682 --> 00:00:17,767
[Morgan Freeman] In the depths of space,

3
00:00:18,727 --> 00:00:20,603
a threat is looming.

4
00:00:22,647 --> 00:00:26,526
Trapped between the orbits
of Jupiter and Mars…

5
00:00:28,778 --> 00:00:30,947
the asteroid belt.

6
00:00:33,324 --> 00:00:37,454
One and a half million chunks
of ancient rock,

7
00:00:38,329 --> 00:00:40,206
circling the sun.

8
00:00:43,626 --> 00:00:46,129
Drifting endlessly.

9
00:00:55,680 --> 00:00:59,768
But, in a single moment of pure chance…

10
00:01:01,895 --> 00:01:03,897
[rocks crashing, crumbling]

11
00:01:04,731 --> 00:01:08,943
…one asteroid is thrown out of its orbit.

12
00:01:11,029 --> 00:01:12,864
A fleeting instant,

13
00:01:13,615 --> 00:01:16,451
millions of kilometers from Earth,

14
00:01:17,077 --> 00:01:19,913
sends it on a new trajectory

15
00:01:20,830 --> 00:01:25,001
towards the very center
of our solar system.

16
00:01:35,553 --> 00:01:40,433
But its journey will come
to a sudden and violent end,

17
00:01:42,268 --> 00:01:48,066
in one of the most catastrophic events
in Earth's history.

18
00:01:51,277 --> 00:01:53,154
And the final chapter

19
00:01:54,405 --> 00:01:56,282
in the epic story

20
00:01:57,492 --> 00:01:59,536
of the dinosaurs.

21
00:01:59,619 --> 00:02:01,871
[mysterious music building]

22
00:02:01,955 --> 00:02:03,081
[music fades out]

23
00:02:05,250 --> 00:02:10,296
[opening theme music playing]

24
00:02:21,558 --> 00:02:24,310
[rocks crumbling]

25
00:02:30,692 --> 00:02:32,652
[distant roaring]

26
00:02:44,539 --> 00:02:46,124
[roaring]

27
00:03:00,805 --> 00:03:01,973
[music fades out]

28
00:03:12,317 --> 00:03:17,447
[grand orchestral music playing]

29
00:03:23,661 --> 00:03:25,246
It's three million years

30
00:03:25,330 --> 00:03:29,042
since the asteroid
started its journey towards Earth.

31
00:03:31,169 --> 00:03:34,631
And the dinosaurs rule the planet.

32
00:03:35,715 --> 00:03:41,512
They dominate the land
and are now entering the ocean as well.

33
00:03:44,599 --> 00:03:49,979
The high sea levels
have split North America in two…

34
00:03:54,609 --> 00:03:56,653
creating endless coastlines…

35
00:04:00,573 --> 00:04:03,534
hundreds of tropical islands…

36
00:04:05,828 --> 00:04:08,039
and opportunity.

37
00:04:08,122 --> 00:04:10,124
[pterosaurs squawking]

38
00:04:13,294 --> 00:04:18,216
[tense music playing]

39
00:04:18,299 --> 00:04:20,468
[insects chittering]

40
00:04:20,551 --> 00:04:23,304
But these islands are no paradise.

41
00:04:25,348 --> 00:04:26,933
[creature growls]

42
00:04:27,016 --> 00:04:30,019
They are home to a formidable predator.

43
00:04:31,229 --> 00:04:32,981
[footsteps thudding]

44
00:04:33,064 --> 00:04:34,899
[creature growling]

45
00:04:34,983 --> 00:04:40,571
One of the fastest,
most agile dinosaurs of its kind.

46
00:04:44,075 --> 00:04:48,413
North America's answer to the Spinosaurus.

47
00:04:48,496 --> 00:04:50,164
[creature growls]

48
00:04:50,248 --> 00:04:52,792
[footsteps thudding]

49
00:04:57,922 --> 00:04:58,965
[music fades]

50
00:04:59,716 --> 00:05:03,052
Just not in the way you would think.

51
00:05:03,136 --> 00:05:04,429
[creature squawks]

52
00:05:04,512 --> 00:05:06,681
Not even remotely.

53
00:05:07,515 --> 00:05:09,100
[chittering]

54
00:05:09,183 --> 00:05:12,061
This is Hesperornis.

55
00:05:12,145 --> 00:05:13,313
[grunts]

56
00:05:13,396 --> 00:05:17,900
He is formidable, and he is fast.

57
00:05:17,984 --> 00:05:20,486
[squawking]

58
00:05:20,570 --> 00:05:26,284
But he's pretty much the opposite
of his giant, terrifying cousins.

59
00:05:27,452 --> 00:05:28,453
[vocalizes]

60
00:05:31,039 --> 00:05:33,666
[Hesperornis squawking]

61
00:05:36,294 --> 00:05:37,337
He's awkward…

62
00:05:37,420 --> 00:05:38,421
[wails]

63
00:05:38,504 --> 00:05:39,630
…and clumsy.

64
00:05:39,714 --> 00:05:41,966
[all grunting and squawking]

65
00:05:42,050 --> 00:05:43,634
And has tiny teeth.

66
00:05:43,718 --> 00:05:44,719
[both squawk]

67
00:05:44,802 --> 00:05:48,431
Not exactly the traits
of a ferocious hunter.

68
00:05:50,183 --> 00:05:53,519
But what he does share with Spinosaurus

69
00:05:54,187 --> 00:05:57,732
is that he's not confined to dry land.

70
00:05:58,900 --> 00:06:00,902
[bright orchestral music playing]

71
00:06:05,281 --> 00:06:10,995
In fact, he's the most advanced
aquatic dinosaur in history.

72
00:06:17,794 --> 00:06:21,422
Like some sort of prehistoric penguin,

73
00:06:22,465 --> 00:06:27,804
he's able to swim far out to sea
to access feeding grounds

74
00:06:28,429 --> 00:06:31,849
that were previously out of reach.

75
00:06:45,947 --> 00:06:48,825
[music turns ethereal]

76
00:06:51,953 --> 00:06:56,541
This is the bounty of his new blue realm.

77
00:07:02,380 --> 00:07:03,214
[water gurgling]

78
00:07:05,842 --> 00:07:11,305
Down here, his big clumsy feet
become powerful propellers.

79
00:07:15,309 --> 00:07:21,315
And his 94 needle-sharp teeth
snatch fish with ease.

80
00:07:38,082 --> 00:07:40,376
But as an air-breather,

81
00:07:41,294 --> 00:07:44,213
he's still tied to the surface.

82
00:07:48,468 --> 00:07:50,470
[ominous music playing]

83
00:07:56,350 --> 00:08:00,813
And the surface
is not a safe place to linger.

84
00:08:04,275 --> 00:08:05,610
Because below,

85
00:08:06,944 --> 00:08:09,155
there are beasts

86
00:08:09,822 --> 00:08:13,159
twice the size of a killer whale.

87
00:08:20,500 --> 00:08:22,502
Mosasaurs.

88
00:08:29,342 --> 00:08:33,429
The apex predators of these seas.

89
00:08:33,513 --> 00:08:34,514
[squawks]

90
00:08:35,389 --> 00:08:37,892
[suspenseful music playing]

91
00:08:41,771 --> 00:08:45,399
Hesperornis must get back to the shore.

92
00:08:50,530 --> 00:08:54,033
But the mosasaur moves
with frightening speed.

93
00:08:57,036 --> 00:09:01,582
Luckily, Hesperornis is much more agile.

94
00:09:08,297 --> 00:09:09,840
But he's exhausted.

95
00:09:13,219 --> 00:09:18,224
Which gives the mosasaur one last shot.

96
00:09:26,148 --> 00:09:28,150
[suspenseful music fades out]

97
00:09:36,492 --> 00:09:39,954
Hesperornis is a true survivor,

98
00:09:41,122 --> 00:09:46,627
venturing further into the ocean
than any dinosaur ever has.

99
00:09:46,711 --> 00:09:48,713
[panting]

100
00:09:49,589 --> 00:09:55,052
But these waters are treacherous,
even for the best swimmers.

101
00:09:55,136 --> 00:09:56,137
[squawks]

102
00:09:56,929 --> 00:09:59,390
-[screeching desperately]
-[ominous music playing]

103
00:10:03,311 --> 00:10:07,106
Despite the dinosaurs' success
in the shallows,

104
00:10:07,690 --> 00:10:09,734
the mosasaurs

105
00:10:09,817 --> 00:10:11,736
rule the waves.

106
00:10:18,242 --> 00:10:19,827
[creatures calling, grunting]

107
00:10:19,910 --> 00:10:23,831
Eight hundred miles north, on land,

108
00:10:24,332 --> 00:10:26,250
it's a different story.

109
00:10:28,252 --> 00:10:31,547
[majestic music playing]

110
00:10:38,095 --> 00:10:41,641
Fueled by a warm, stable climate,

111
00:10:41,724 --> 00:10:46,145
the dinosaurs' dominance here
is unrivaled.

112
00:10:46,979 --> 00:10:51,359
-[twigs snapping]
-[sauropods grunting softly]

113
00:10:53,944 --> 00:10:58,699
The great sauropods
are thriving among the tall trees,

114
00:10:58,783 --> 00:11:02,119
as they have
since the dawn of the Jurassic.

115
00:11:02,203 --> 00:11:04,664
[sauropods vocalizing]

116
00:11:08,626 --> 00:11:12,380
But down below,
there has been a revolution.

117
00:11:14,757 --> 00:11:15,758
[creature grunts]

118
00:11:18,969 --> 00:11:22,306
A female hadrosaur.

119
00:11:22,807 --> 00:11:23,808
[vocalizes]

120
00:11:25,434 --> 00:11:29,605
While she may be dwarfed
in present company,

121
00:11:29,689 --> 00:11:33,526
she's actually larger than an elephant.

122
00:11:34,568 --> 00:11:38,155
And she won't be held up by these giants,

123
00:11:39,532 --> 00:11:43,452
because nothing can stop
a mother on a mission.

124
00:11:45,871 --> 00:11:47,707
And that mission

125
00:11:48,207 --> 00:11:50,751
is to feed her family…

126
00:11:52,920 --> 00:11:54,588
who are somewhere

127
00:11:56,132 --> 00:11:57,466
down there.

128
00:11:59,719 --> 00:12:03,055
-[hadrosaurs grunting]
-[majestic music continues]

129
00:12:07,893 --> 00:12:14,108
Long ago, their cheek-stuffing ancestors
were scarce and scattered.

130
00:12:14,191 --> 00:12:16,902
[hadrosaurs grunting]

131
00:12:16,986 --> 00:12:23,701
But hadrosaurs are now so successful,
their herds are thousands strong.

132
00:12:26,245 --> 00:12:31,751
The greatest gatherings of dinosaurs
the world has ever known.

133
00:12:34,128 --> 00:12:38,549
But this female's family
isn't traveling with the herd.

134
00:12:40,342 --> 00:12:43,637
There, in the safety of the crèche,

135
00:12:44,138 --> 00:12:48,434
a sprawling nursery
for hundreds of young hadrosaurs…

136
00:12:48,517 --> 00:12:51,103
[hadrosaurs grunting and vocalizing]

137
00:12:51,187 --> 00:12:54,106
…including her own.

138
00:12:54,190 --> 00:12:55,441
[grunts]

139
00:12:55,983 --> 00:12:58,903
[baby hadrosaurs squeaking]

140
00:12:58,986 --> 00:13:03,699
At six months old,
they have insatiable appetites,

141
00:13:04,492 --> 00:13:08,412
and will eat
almost anything she brings them.

142
00:13:11,457 --> 00:13:12,708
Anything.

143
00:13:21,967 --> 00:13:23,052
[grunts]

144
00:13:23,886 --> 00:13:24,845
[huffs]

145
00:13:24,929 --> 00:13:29,475
Feeding in this bird-like way
takes a lot of refills,

146
00:13:30,142 --> 00:13:34,688
so she's constantly leaving
to go find food.

147
00:13:34,772 --> 00:13:36,732
[squeaking continues]

148
00:13:36,816 --> 00:13:39,193
And when moms are away,

149
00:13:39,276 --> 00:13:42,196
little ones will play.

150
00:13:42,279 --> 00:13:44,281
[lighthearted music playing]

151
00:13:56,794 --> 00:13:58,045
[adult hadrosaur roars]

152
00:14:03,551 --> 00:14:05,970
[suspenseful music playing]

153
00:14:06,053 --> 00:14:08,931
With the wingspan of a fighter jet,

154
00:14:09,473 --> 00:14:13,310
pterosaurs are now bigger than ever.

155
00:14:15,938 --> 00:14:19,567
And crèches are
the perfect hunting grounds,

156
00:14:20,067 --> 00:14:24,405
where unguarded nests
are the easiest pickings.

157
00:14:27,992 --> 00:14:29,994
[baby hadrosaurs squeaking]

158
00:14:34,874 --> 00:14:36,876
[suspenseful music continues]

159
00:14:42,840 --> 00:14:44,133
[roars]

160
00:14:44,216 --> 00:14:46,886
Despite the threat
from this towering monster,

161
00:14:46,969 --> 00:14:50,347
the mothers will defend their babies
at all costs.

162
00:14:50,431 --> 00:14:51,974
[mother hadrosaur roars]

163
00:14:53,267 --> 00:14:55,644
[pterosaur roaring]

164
00:14:55,728 --> 00:14:58,856
[all growling and grunting]

165
00:15:07,781 --> 00:15:13,078
But the giant pterosaur
is determined to feed.

166
00:15:13,162 --> 00:15:16,081
[roaring]

167
00:15:16,165 --> 00:15:19,418
-[baby hadrosaurs squeaking]
-[pterosaur continues roaring]

168
00:15:20,044 --> 00:15:25,090
The screams from the nest
are like a dinner bell to the predator.

169
00:15:25,174 --> 00:15:27,217
[baby hadrosaurs continue squeaking]

170
00:15:41,190 --> 00:15:44,485
But the little ones
aren't just crying in fear.

171
00:15:45,611 --> 00:15:47,905
They're calling for help.

172
00:15:47,988 --> 00:15:51,617
-[roars ferociously]
-[triumphant music playing]

173
00:16:04,213 --> 00:16:06,256
[mother hadrosaur roars]

174
00:16:07,216 --> 00:16:11,136
This fierce instinct
to protect their young

175
00:16:12,179 --> 00:16:17,017
is central to
the hadrosaurs' remarkable success.

176
00:16:17,101 --> 00:16:19,103
-[mother hadrosaur grunts gently]
-[babies squawking]

177
00:16:19,186 --> 00:16:24,692
But other dinosaurs
are taking defense to a whole new level

178
00:16:26,151 --> 00:16:31,490
because the arms race
between predator and prey is escalating.

179
00:16:33,993 --> 00:16:39,748
And this will give rise
to the most iconic dinosaurs of all time.

180
00:16:39,832 --> 00:16:42,584
[intriguing music playing]

181
00:16:45,879 --> 00:16:48,132
This will take so long

182
00:16:48,632 --> 00:16:52,803
that the continent
of North America will shift,

183
00:16:54,013 --> 00:16:57,433
the land buckling up into the sky.

184
00:17:06,900 --> 00:17:09,028
The Rocky Mountains.

185
00:17:11,488 --> 00:17:15,034
It's here, in the foothills below,

186
00:17:16,744 --> 00:17:19,997
that the dinosaurs are making an impact.

187
00:17:20,080 --> 00:17:21,832
[dinosaurs grunting]

188
00:17:21,915 --> 00:17:24,543
[Pachycephalosaurus males
grunting aggressively]

189
00:17:24,626 --> 00:17:26,962
[tense music playing]

190
00:17:28,797 --> 00:17:30,883
Pachycephalosaurus.

191
00:17:32,384 --> 00:17:35,804
Using their outrageously thick skulls…

192
00:17:38,640 --> 00:17:41,602
to duel for supremacy.

193
00:17:42,269 --> 00:17:45,981
[aggressive grunting continues]

194
00:17:47,024 --> 00:17:48,776
And alongside them,

195
00:17:49,985 --> 00:17:53,906
a dinosaur
with even more impressive headgear.

196
00:17:55,616 --> 00:17:56,658
[skulls thud]

197
00:18:00,120 --> 00:18:02,331
Triceratops.

198
00:18:02,414 --> 00:18:03,332
[grunts]

199
00:18:10,631 --> 00:18:13,092
She may look like a rhinoceros,

200
00:18:13,926 --> 00:18:16,637
but she's twice the size of one.

201
00:18:20,057 --> 00:18:25,104
And armed with spear-like horns
over one meter in length.

202
00:18:32,778 --> 00:18:38,283
Triceratops and Pachycephalosaurus
have impressive weapons.

203
00:18:40,661 --> 00:18:43,205
Yet there are some here

204
00:18:43,288 --> 00:18:47,126
that are even more armed and dangerous.

205
00:18:48,001 --> 00:18:51,130
[thunder crashing]

206
00:18:51,213 --> 00:18:52,756
[lightning crackling]

207
00:18:58,303 --> 00:19:00,639
Under the cover of darkness,

208
00:19:01,348 --> 00:19:04,893
the latest and greatest
of the armored warriors.

209
00:19:07,437 --> 00:19:11,775
Six meters long and highly territorial.

210
00:19:13,360 --> 00:19:14,987
[grunting lowly]

211
00:19:15,070 --> 00:19:18,782
Ankylosaurus magniventris.

212
00:19:21,785 --> 00:19:23,787
[tense music playing]

213
00:19:27,082 --> 00:19:29,626
He's on patrol for intruders

214
00:19:31,461 --> 00:19:35,174
bold enough to breach his borders.

215
00:19:39,136 --> 00:19:40,470
[growls]

216
00:19:43,265 --> 00:19:48,812
His tank-like torso is covered
in dozens of thick, bony plates.

217
00:19:49,730 --> 00:19:50,731
[grunts]

218
00:19:53,150 --> 00:19:54,151
[grunts again]

219
00:19:55,235 --> 00:19:56,862
And what's more,

220
00:19:57,696 --> 00:20:00,532
he has a powerful new weapon.

221
00:20:05,037 --> 00:20:08,957
A club-like tail, weighing half a ton,

222
00:20:09,750 --> 00:20:14,338
that he can use to take on
whatever stalks these forests.

223
00:20:16,548 --> 00:20:18,550
[thunder crashing]

224
00:20:20,469 --> 00:20:22,804
-He senses something.
-[grunts]

225
00:20:27,684 --> 00:20:30,270
[growls lowly]

226
00:20:31,355 --> 00:20:32,397
[grunting]

227
00:20:41,615 --> 00:20:43,575
[thunder crashing]

228
00:20:45,035 --> 00:20:46,203
[grunts]

229
00:20:52,000 --> 00:20:54,253
His borders have been breached…

230
00:20:56,463 --> 00:20:59,716
by the worst possible intruder of all.

231
00:21:01,677 --> 00:21:03,679
[low, menacing growling]

232
00:21:10,686 --> 00:21:12,521
[thunder crashing]

233
00:21:12,604 --> 00:21:14,648
A Tyrannosaurus rex.

234
00:21:14,731 --> 00:21:16,692
[growls menacingly]

235
00:21:17,609 --> 00:21:18,944
[Ankylosaurus grunts]

236
00:21:33,125 --> 00:21:35,127
[tense music continues]

237
00:21:59,568 --> 00:22:01,570
[music intensifies]

238
00:22:02,904 --> 00:22:04,239
[Ankylosaurus groans]

239
00:22:11,913 --> 00:22:13,915
[Ankylosaurus groans]

240
00:22:17,085 --> 00:22:18,253
[Ankylosaurus roars]

241
00:22:20,630 --> 00:22:22,924
[roars]

242
00:22:27,804 --> 00:22:31,058
[Ankylosaurus grunting]

243
00:22:32,642 --> 00:22:35,228
[both growing and grunting]

244
00:22:39,483 --> 00:22:41,443
Ankylosaurus

245
00:22:42,402 --> 00:22:43,653
versus T. rex.

246
00:22:45,655 --> 00:22:46,782
[T. rex groans]

247
00:22:48,700 --> 00:22:50,202
[roars]

248
00:22:50,285 --> 00:22:52,579
[Ankylosaurus roars]

249
00:22:53,538 --> 00:22:55,874
An evolutionary stalemate,

250
00:22:56,875 --> 00:22:59,378
millions of years in the making.

251
00:23:06,426 --> 00:23:09,012
[Ankylosaurus roars]

252
00:23:09,679 --> 00:23:12,474
[grunting]

253
00:23:20,232 --> 00:23:22,234
But in this arms race,

254
00:23:24,069 --> 00:23:28,198
there's one thing
that does set these dinosaurs apart.

255
00:23:31,410 --> 00:23:33,161
Intelligence.

256
00:23:35,372 --> 00:23:36,915
[Ankylosaurus groans]

257
00:23:37,874 --> 00:23:39,459
[music fades out]

258
00:23:42,087 --> 00:23:45,590
[insects chittering]

259
00:23:48,677 --> 00:23:50,720
[gentle music playing]

260
00:23:57,644 --> 00:24:01,273
[music darkens]

261
00:24:09,364 --> 00:24:12,576
[T. rex grunting]

262
00:24:15,078 --> 00:24:20,667
T. rex is one of the most
fearsome predators of all time.

263
00:24:23,211 --> 00:24:25,922
And to remain at the top of her game…

264
00:24:26,006 --> 00:24:27,382
[growls]

265
00:24:27,466 --> 00:24:33,138
…she must eat the equivalent
of 200 steaks every day.

266
00:24:33,221 --> 00:24:35,223
[insects buzzing]

267
00:24:35,307 --> 00:24:40,562
And yet, so far,
she hasn't eaten a single bite.

268
00:24:43,565 --> 00:24:49,154
That's because she has special plans
for this take-out meal.

269
00:24:54,326 --> 00:24:58,955
But Ankylosaurus is no light snack.

270
00:25:05,712 --> 00:25:08,423
Six tons of muscle and bone,

271
00:25:08,924 --> 00:25:13,178
with an assortment of lumps and bumps.

272
00:25:25,398 --> 00:25:27,359
Even for T. rex,

273
00:25:28,109 --> 00:25:29,986
it's quite a drag.

274
00:25:33,240 --> 00:25:35,242
[idyllic music playing]

275
00:26:04,312 --> 00:26:05,564
Finally,

276
00:26:06,690 --> 00:26:08,358
her journey's end.

277
00:26:08,441 --> 00:26:11,403
[grunting]

278
00:26:17,659 --> 00:26:22,122
And the reason
she's gone to all this effort.

279
00:26:29,879 --> 00:26:32,632
[baby T. rexes yelping]

280
00:26:35,176 --> 00:26:37,887
Five hungry hatchlings.

281
00:26:42,684 --> 00:26:44,686
[mother T. rex vocalizing gently]

282
00:26:51,610 --> 00:26:53,445
A ferocious killer,

283
00:26:54,112 --> 00:26:55,238
yes.

284
00:26:56,364 --> 00:26:57,824
But also,

285
00:26:58,366 --> 00:27:00,076
a devoted mother.

286
00:27:00,160 --> 00:27:02,162
[baby T. rexes yelping]

287
00:27:15,342 --> 00:27:16,384
[flesh tears]

288
00:27:16,468 --> 00:27:18,219
She will ensure

289
00:27:19,304 --> 00:27:21,723
her little ones are well-fed…

290
00:27:25,644 --> 00:27:29,564
to give them the very best start in life.

291
00:27:29,648 --> 00:27:31,650
[all squawking eagerly]

292
00:27:34,235 --> 00:27:36,905
Something their distant ancestors

293
00:27:37,405 --> 00:27:39,324
could only dream of.

294
00:27:42,661 --> 00:27:48,667
Far back in the Triassic,
tiny Marasuchus hatched into hell.

295
00:27:50,168 --> 00:27:53,046
These dinosaurs-in-the-making,

296
00:27:54,172 --> 00:27:56,925
forced to live in the shadows.

297
00:27:57,008 --> 00:27:57,842
[reptile huffs]

298
00:27:57,926 --> 00:28:01,012
Hiding from the ruling reptiles.

299
00:28:01,096 --> 00:28:02,931
-[reptile growls]
-[Marasuchus yelps]

300
00:28:03,890 --> 00:28:06,184
But when fate intervened…

301
00:28:08,311 --> 00:28:10,230
they turned catastrophe

302
00:28:11,523 --> 00:28:13,817
into opportunity…

303
00:28:16,403 --> 00:28:19,197
and began their monumental rise.

304
00:28:19,280 --> 00:28:21,908
[majestic music playing]

305
00:28:22,659 --> 00:28:26,955
Growing bigger, stronger,
and ever more formidable.

306
00:28:27,038 --> 00:28:30,417
[dinosaurs grunting aggressively]

307
00:28:32,752 --> 00:28:34,129
[vocalizing in distress]

308
00:28:34,212 --> 00:28:35,463
In time,

309
00:28:36,840 --> 00:28:40,135
they would triumph, not just on land,

310
00:28:41,636 --> 00:28:42,721
but in the sea

311
00:28:44,472 --> 00:28:45,974
and the sky.

312
00:28:46,516 --> 00:28:47,892
[all squawking]

313
00:28:47,976 --> 00:28:51,020
After 160 million years,

314
00:28:52,605 --> 00:28:55,316
the dinosaurs are now so dominant…

315
00:28:55,400 --> 00:28:56,735
[both growling]

316
00:28:56,818 --> 00:29:00,321
…nothing on Earth can stand in their way.

317
00:29:00,405 --> 00:29:02,282
[roars]

318
00:29:02,365 --> 00:29:04,367
[squawking eagerly]

319
00:29:06,828 --> 00:29:09,539
But something not of this Earth

320
00:29:10,123 --> 00:29:11,332
will.

321
00:29:11,416 --> 00:29:13,126
[foreboding music playing]

322
00:29:13,209 --> 00:29:17,922
Because as this family's journey
is just getting started,

323
00:29:19,215 --> 00:29:20,675
another journey

324
00:29:21,176 --> 00:29:23,344
is approaching its end.

325
00:29:27,932 --> 00:29:34,522
The asteroid, now hurtling towards Earth
at 50 times the speed of sound,

326
00:29:36,024 --> 00:29:40,028
will finally have its date with destiny.

327
00:29:40,612 --> 00:29:42,614
[dramatic music playing]

328
00:29:50,622 --> 00:29:52,624
-[music stops abruptly]
-[waves lapping]

329
00:29:53,958 --> 00:29:55,960
[squawking]

330
00:30:01,925 --> 00:30:03,593
[rumbling]

331
00:30:03,676 --> 00:30:05,678
[asteroid whooshes]

332
00:30:06,888 --> 00:30:08,890
[distant explosion]

333
00:30:10,809 --> 00:30:12,811
[distant rumbling]

334
00:30:13,561 --> 00:30:18,483
It smashes into the ocean
off the coast of Mexico,

335
00:30:19,234 --> 00:30:23,613
with the power of a billion atomic bombs.

336
00:30:24,823 --> 00:30:27,951
Temperatures are hot enough
to vaporize the seabed…

337
00:30:30,995 --> 00:30:35,667
along with every living thing
for hundreds of kilometers.

338
00:30:44,676 --> 00:30:48,096
Far away, in the foothills of the Rockies,

339
00:30:49,055 --> 00:30:55,144
these great dinosaurs
have no idea what's about to hit them.

340
00:30:56,729 --> 00:30:59,274
[earth rumbling]

341
00:31:02,986 --> 00:31:05,196
[grunting in distress]

342
00:31:06,698 --> 00:31:08,700
[sauropods grunting]

343
00:31:17,125 --> 00:31:20,795
The largest earthquakes in history.

344
00:31:25,717 --> 00:31:27,176
[sauropod groans]

345
00:31:29,596 --> 00:31:32,307
But the worst is yet to come.

346
00:31:35,602 --> 00:31:41,065
An enormous wall
of superheated debris explodes outward.

347
00:31:41,149 --> 00:31:43,651
[air rushing forcefully]

348
00:31:43,735 --> 00:31:47,322
[squeaking]

349
00:31:47,405 --> 00:31:50,074
[hadrosaur herd grunting]

350
00:31:58,499 --> 00:32:03,254
The dinosaurs
caught beneath this death cloud

351
00:32:03,338 --> 00:32:05,465
are entombed.

352
00:32:08,051 --> 00:32:13,222
Their world is so hot,
it literally bursts into flames.

353
00:32:13,306 --> 00:32:16,768
[grunting in distress]

354
00:32:19,979 --> 00:32:21,564
[air whooshes]

355
00:32:22,357 --> 00:32:24,442
Even the toughest armor

356
00:32:24,943 --> 00:32:26,778
is no protection.

357
00:32:26,861 --> 00:32:28,863
[grunting in distress]

358
00:32:31,741 --> 00:32:35,244
[dark music playing]

359
00:32:36,162 --> 00:32:39,749
The cloud quickly engulfs
the entire planet,

360
00:32:40,249 --> 00:32:42,418
suffocating it with ash.

361
00:32:44,504 --> 00:32:46,923
Shrouding it in darkness.

362
00:33:02,355 --> 00:33:04,357
[music fades out]

363
00:33:07,235 --> 00:33:09,237
[somber music playing]

364
00:33:23,584 --> 00:33:25,586
[labored breathing]

365
00:33:31,676 --> 00:33:32,760
[calls desperately]

366
00:33:32,844 --> 00:33:37,890
The few still standing
at the end of the day

367
00:33:39,642 --> 00:33:41,602
are in a nightmare.

368
00:33:43,104 --> 00:33:46,399
Choking in the gloom.

369
00:33:52,447 --> 00:33:54,907
[T. rex panting weakly]

370
00:34:12,675 --> 00:34:14,218
By nightfall,

371
00:34:14,886 --> 00:34:20,475
the death toll
for the dinosaurs is catastrophic.

372
00:34:41,412 --> 00:34:43,414
[bleak music playing]

373
00:34:47,668 --> 00:34:50,338
Starved of the sun's rays,

374
00:34:50,838 --> 00:34:54,759
an impact winter descends on the Earth.

375
00:35:01,140 --> 00:35:05,937
Global temperatures drop
by 25 degrees Celsius.

376
00:35:09,148 --> 00:35:15,363
Conditions too cold
for almost any dinosaur to withstand.

377
00:35:16,155 --> 00:35:18,157
[mournful string music playing]

378
00:35:27,041 --> 00:35:29,460
Giant sauropods,

379
00:35:29,961 --> 00:35:31,671
laid to rest

380
00:35:32,171 --> 00:35:37,677
in the cinders of the very trees
that made them so tall.

381
00:35:45,393 --> 00:35:47,395
[wind whistling]

382
00:35:53,484 --> 00:35:55,778
In their crowded colonies,

383
00:35:56,529 --> 00:35:58,614
those who live together,

384
00:35:59,407 --> 00:36:00,950
die together.

385
00:36:08,708 --> 00:36:12,295
Protective mothers
cannot shield their young

386
00:36:12,378 --> 00:36:14,505
from the freezing temperatures.

387
00:36:20,636 --> 00:36:24,765
The punishing cold has also taken its toll

388
00:36:25,391 --> 00:36:28,728
on the most famous dinosaur of all.

389
00:36:33,816 --> 00:36:37,445
[breathing weakly]

390
00:36:37,528 --> 00:36:39,530
The Tyrant King

391
00:36:40,448 --> 00:36:41,866
has fallen.

392
00:37:01,802 --> 00:37:05,223
Even the mighty Tyrannosaurus rex

393
00:37:05,848 --> 00:37:08,351
will not survive this.

394
00:37:40,007 --> 00:37:42,551
The reign of the dinosaurs

395
00:37:44,095 --> 00:37:45,721
has finally

396
00:37:46,514 --> 00:37:48,474
come to an end.

397
00:37:48,557 --> 00:37:51,894
-[wind whistling]
-[bleak note playing]

398
00:38:00,945 --> 00:38:02,530
[note fades to silence]

399
00:38:05,074 --> 00:38:07,410
[rhythmic tapping sound]

400
00:38:07,493 --> 00:38:08,828
[cracking]

401
00:38:11,789 --> 00:38:14,709
[intriguing music playing]

402
00:38:17,003 --> 00:38:20,298
But 66 million years later…

403
00:38:22,717 --> 00:38:26,262
the dinosaurs are rising again.

404
00:38:30,891 --> 00:38:32,268
This time,

405
00:38:32,351 --> 00:38:34,270
at our hands.

406
00:38:42,028 --> 00:38:47,908
Today, their fossils stand
as monuments to a lost world.

407
00:38:49,076 --> 00:38:50,411
But more than that,

408
00:38:51,787 --> 00:38:58,210
they are the keys that unlock
the secrets of the dinosaur story.

409
00:39:00,004 --> 00:39:04,884
Our understanding of their lives
is now greater than ever.

410
00:39:06,302 --> 00:39:08,471
From their very first moments,

411
00:39:09,638 --> 00:39:11,265
to their very last.

412
00:39:15,019 --> 00:39:20,024
And the revelation
that on Earth's darkest day,

413
00:39:20,608 --> 00:39:23,361
not all dinosaurs died.

414
00:39:25,363 --> 00:39:30,743
Some were small enough
to find shelter from the apocalypse.

415
00:39:33,496 --> 00:39:35,373
And survive

416
00:39:36,040 --> 00:39:38,459
even to this day.

417
00:39:39,668 --> 00:39:40,878
[epic music playing]

418
00:39:40,961 --> 00:39:46,384
The flying dinosaurs
we now call the birds.

419
00:39:50,846 --> 00:39:56,936
And the clues to their past
are hiding in plain sight.

420
00:40:01,440 --> 00:40:02,983
[eagle screeches]

421
00:40:03,901 --> 00:40:05,736
[chittering]

422
00:40:12,368 --> 00:40:13,953
[vocalizing]

423
00:40:14,036 --> 00:40:14,870
[birds calling]

424
00:40:14,954 --> 00:40:16,288
[dinosaurs grunting]

425
00:40:18,416 --> 00:40:24,588
The remarkable journey
that started 235 million years ago

426
00:40:25,798 --> 00:40:29,427
continues alongside us.

427
00:40:31,554 --> 00:40:33,722
They are the last remaining link…

428
00:40:36,016 --> 00:40:38,644
to a long-lost kingdom

429
00:40:40,646 --> 00:40:42,231
that was

430
00:40:43,232 --> 00:40:44,733
the age

431
00:40:45,526 --> 00:40:47,445
of the dinosaurs.

432
00:40:47,528 --> 00:40:49,530
[epic music continues]

433
00:40:52,575 --> 00:40:53,784
[music fades out]

434
00:40:55,286 --> 00:40:57,788
[closing theme music playing]

435
00:42:45,396 --> 00:42:47,690
[music fades out]