1
00:00:07,123 --> 00:00:09,483
[ethereal music playing]

2
00:00:16,163 --> 00:00:17,603
[birds chirping]

3
00:00:17,683 --> 00:00:18,963
[Freeman] The universe…

4
00:00:19,043 --> 00:00:20,123
[calf whines]

5
00:00:20,203 --> 00:00:22,043
…has provided our planet

6
00:00:22,123 --> 00:00:25,243
with all the ingredients
needed for life to emerge…

7
00:00:25,323 --> 00:00:26,203
[whooshing]

8
00:00:26,283 --> 00:00:27,403
…and flourish.

9
00:00:29,563 --> 00:00:31,483
The energy flowing through us.

10
00:00:36,523 --> 00:00:38,563
The daily rhythms we follow.

11
00:00:38,643 --> 00:00:40,043
[cub yowls]

12
00:00:40,123 --> 00:00:41,363
[zapping]

13
00:00:41,443 --> 00:00:43,923
[Freeman] The elements we are made of.

14
00:00:47,323 --> 00:00:49,843
But behind all these wonders…

15
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[ethereal tinkling]

16
00:00:50,963 --> 00:00:52,883
…lies a mysterious force…

17
00:00:55,123 --> 00:00:56,003
[exploding]

18
00:00:56,083 --> 00:00:58,563
…that makes all of this possible.

19
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[exploding]

20
00:01:01,083 --> 00:01:01,963
Gravity.

21
00:01:08,643 --> 00:01:10,923
It holds everything in place.

22
00:01:15,803 --> 00:01:17,523
It builds every star…

23
00:01:18,683 --> 00:01:19,923
[rumbling]

24
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…and shapes every planet.

25
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[whooshing]

26
00:01:26,523 --> 00:01:28,643
And guides every life.

27
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It's the ultimate force of attraction.

28
00:01:34,563 --> 00:01:35,443
[penguin squawks]

29
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So profound,
it will bring two young souls together…

30
00:01:42,723 --> 00:01:45,923
in their search for the perfect mate.

31
00:01:48,163 --> 00:01:50,643
[dramatic music playing]

32
00:02:13,763 --> 00:02:18,923
In the Southern Ocean,
over 2,000 kilometers from Antarctica…

33
00:02:19,003 --> 00:02:21,643
[majestic music playing]

34
00:02:21,723 --> 00:02:25,363
…lies the windswept island
of South Georgia.

35
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[penguins squawking]

36
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Home to a colony

37
00:02:32,883 --> 00:02:35,523
of half a million king penguins.

38
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[squawking continues]

39
00:02:44,123 --> 00:02:47,123
And it's a big day for two of them.

40
00:02:52,643 --> 00:02:53,643
New parents.

41
00:02:59,083 --> 00:03:00,723
For over 50 days…

42
00:03:03,443 --> 00:03:07,523
they've been taking turns
keeping their precious cargo safe…

43
00:03:08,603 --> 00:03:10,883
[penguins squawking loudly]

44
00:03:10,963 --> 00:03:12,283
…and warm.

45
00:03:14,963 --> 00:03:19,563
And today, it's time
to welcome their baby son into the world.

46
00:03:22,123 --> 00:03:25,203
[chick chirping]

47
00:03:25,283 --> 00:03:28,243
[calm music playing]

48
00:03:30,843 --> 00:03:31,723
Little Rocky…

49
00:03:35,123 --> 00:03:37,003
meet big world.

50
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And on the other side of the island,

51
00:03:48,363 --> 00:03:50,883
another little chick is stepping out.

52
00:03:53,123 --> 00:03:54,243
[chick chirping]

53
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A girl.

54
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Paloma.

55
00:03:58,843 --> 00:04:00,123
[chirping continues]

56
00:04:04,963 --> 00:04:09,283
Rocky and Paloma don't know it yet,
but they are destined for each other.

57
00:04:10,523 --> 00:04:12,923
[calm music continues]

58
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A force of attraction beyond their control

59
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will bring them together.

60
00:04:31,803 --> 00:04:33,043
[chirping continues]

61
00:04:34,523 --> 00:04:35,883
[dramatic music building]

62
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This force not only hugs
Rocky and Paloma firmly to the ground…

63
00:04:43,363 --> 00:04:44,523
[chirping]

64
00:04:45,843 --> 00:04:48,723
…it hugs our atmosphere to the planet.

65
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It keeps Earth orbiting the Sun…

66
00:04:58,003 --> 00:05:00,403
[whooshing]

67
00:05:03,083 --> 00:05:08,203
…the Sun rotating
around the center of our galaxy…

68
00:05:08,283 --> 00:05:09,883
[whooshing]

69
00:05:09,963 --> 00:05:14,243
…and galaxies dancing
and swirling around each other

70
00:05:16,083 --> 00:05:18,323
on the grandest of scales.

71
00:05:21,763 --> 00:05:25,403
Gravity holds all the pieces
of our universe together,

72
00:05:26,643 --> 00:05:28,083
connecting everything…

73
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[whooshing]

74
00:05:31,643 --> 00:05:34,003
…from the most distant star…

75
00:05:37,323 --> 00:05:38,603
[whooshing]

76
00:05:41,683 --> 00:05:43,323
…to the tiniest penguin.

77
00:05:47,723 --> 00:05:52,443
But Rocky and Paloma aren't thinking
about their place in the cosmos…

78
00:05:54,923 --> 00:05:56,403
[chick chirping]

79
00:05:56,483 --> 00:05:57,963
…just their next meal.

80
00:05:59,083 --> 00:06:01,043
[playful music playing]

81
00:06:04,003 --> 00:06:07,203
It's taking all the efforts
of their devoted parents…

82
00:06:09,883 --> 00:06:12,443
to feed their insatiable appetites.

83
00:06:21,003 --> 00:06:22,123
It's a thankless…

84
00:06:25,563 --> 00:06:27,083
and never-ending task.

85
00:06:29,923 --> 00:06:32,323
[chirping continues]

86
00:06:33,603 --> 00:06:36,923
[penguins squawking]

87
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They're doing everything they can
to fatten their chicks in time for winter.

88
00:06:50,083 --> 00:06:53,163
Because as Rocky and Paloma
have been growing bigger…

89
00:06:55,243 --> 00:06:58,483
the days have been growing shorter.

90
00:07:00,763 --> 00:07:02,603
[pensive music playing]

91
00:07:04,323 --> 00:07:07,043
Food is becoming scarce.

92
00:07:10,323 --> 00:07:11,843
[penguin squeaking]

93
00:07:11,923 --> 00:07:14,203
Their parents must leave the island…

94
00:07:18,363 --> 00:07:21,523
and travel hundreds of kilometers
out to sea…

95
00:07:23,883 --> 00:07:25,163
to hunt for food…

96
00:07:27,203 --> 00:07:29,443
leaving their precious chicks for months

97
00:07:30,043 --> 00:07:32,403
to fend for themselves.

98
00:07:35,523 --> 00:07:37,763
[solemn music playing]

99
00:07:40,003 --> 00:07:43,403
[Paloma crying out]

100
00:07:43,483 --> 00:07:46,083
Paloma's cries go unanswered…

101
00:07:48,243 --> 00:07:50,923
as the first, loneliest night sets in.

102
00:07:51,003 --> 00:07:52,643
[wind gusting]

103
00:07:54,123 --> 00:07:56,923
The darkest moment
in a penguin chick's life.

104
00:07:58,843 --> 00:08:01,163
[whooshing]

105
00:08:02,523 --> 00:08:05,163
[ethereal music playing]

106
00:08:05,243 --> 00:08:09,723
But it's nothing compared
to our universe's darkest moments…

107
00:08:12,843 --> 00:08:15,523
because long before there was an Earth,

108
00:08:17,323 --> 00:08:18,443
a Sun,

109
00:08:19,683 --> 00:08:20,923
or stars…

110
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there was no light at all.

111
00:08:37,243 --> 00:08:41,443
The universe was just
a dark, dense web of gas.

112
00:08:44,283 --> 00:08:46,643
[ethereal music continues]

113
00:08:49,323 --> 00:08:53,323
But here, gravity began to work its magic.

114
00:08:56,643 --> 00:09:01,043
From this gravity came everything.

115
00:09:07,443 --> 00:09:09,563
Parts of the web were pulled together…

116
00:09:12,043 --> 00:09:13,683
into clumps of matter…

117
00:09:14,283 --> 00:09:17,123
[rumbling]

118
00:09:17,203 --> 00:09:19,683
…that grew and grew…

119
00:09:24,963 --> 00:09:29,883
until they got so big,
they collapsed in on themselves…

120
00:09:30,923 --> 00:09:31,963
[creaking]

121
00:09:32,043 --> 00:09:33,523
…bursting into life…

122
00:09:36,523 --> 00:09:38,643
[rumbling]

123
00:09:38,723 --> 00:09:42,203
…as the very first stars.

124
00:09:43,763 --> 00:09:46,043
[zapping]

125
00:09:46,123 --> 00:09:48,043
[rumbling in distance]

126
00:09:50,843 --> 00:09:52,203
Gravity kept working,

127
00:09:52,923 --> 00:09:57,483
sculpting the primordial web
into more and more stars…

128
00:09:59,963 --> 00:10:02,043
pulling them toward each other

129
00:10:03,563 --> 00:10:06,323
and spinning them into vast galaxies.

130
00:10:06,403 --> 00:10:08,963
[majestic music playing]

131
00:10:13,843 --> 00:10:14,763
From nothing,

132
00:10:15,723 --> 00:10:19,443
gravity shaped
an entire universe of possibility…

133
00:10:22,803 --> 00:10:25,843
that still speckles our night sky.

134
00:10:29,643 --> 00:10:31,883
[calm music playing]

135
00:10:31,963 --> 00:10:34,923
[penguins chirping]

136
00:10:35,843 --> 00:10:40,523
But light from distant stars
won't keep penguin chicks warm.

137
00:10:41,763 --> 00:10:43,643
[ominous music playing]

138
00:10:43,723 --> 00:10:45,323
With their parents at sea,

139
00:10:46,203 --> 00:10:49,163
Rocky and Paloma are losing weight,

140
00:10:50,603 --> 00:10:53,843
becoming more and more vulnerable.

141
00:10:53,923 --> 00:10:55,643
[seagull grunting]

142
00:10:55,723 --> 00:10:58,203
[chick squealing]

143
00:11:01,883 --> 00:11:03,763
[ominous music crescendos]

144
00:11:10,443 --> 00:11:12,683
The chicks only refuge from the cold

145
00:11:13,523 --> 00:11:14,883
is their fluffy down

146
00:11:16,563 --> 00:11:17,483
and each other.

147
00:11:17,563 --> 00:11:19,563
[solemn music playing]

148
00:11:19,643 --> 00:11:23,723
Their survival hinges
on a precise, elegant dance

149
00:11:23,803 --> 00:11:25,523
between one star

150
00:11:26,363 --> 00:11:27,483
and one planet,

151
00:11:29,363 --> 00:11:34,123
choreographed by gravity
over four and a half billion years ago.

152
00:11:35,243 --> 00:11:38,043
[whooshing]

153
00:11:39,123 --> 00:11:41,443
[solemn music continues]

154
00:11:43,843 --> 00:11:47,763
Out of the dust and gas left over
from the formation of the Sun…

155
00:11:48,283 --> 00:11:49,923
[rumbling]

156
00:11:51,283 --> 00:11:54,203
…gravity pulled bits and pieces
of rubble together…

157
00:12:00,523 --> 00:12:01,843
[crashing]

158
00:12:01,923 --> 00:12:05,123
…molding them over time into a planet.

159
00:12:05,883 --> 00:12:07,483
[rumbling]

160
00:12:15,963 --> 00:12:19,323
It was unrecognizable
from the home we know now…

161
00:12:21,763 --> 00:12:24,283
but it had all the potential for life…

162
00:12:28,083 --> 00:12:31,843
bathed in the glow of our newborn Sun.

163
00:12:36,563 --> 00:12:41,443
That same Sun,
billions of years later, is now rising…

164
00:12:43,723 --> 00:12:45,083
[calm music playing]

165
00:12:45,683 --> 00:12:49,123
…signaling to Rocky and Paloma's parents,

166
00:12:50,003 --> 00:12:52,603
it's time to return to South Georgia…

167
00:12:57,003 --> 00:13:01,123
with their bellies full of fish.

168
00:13:01,203 --> 00:13:02,923
[penguins squawking]

169
00:13:08,643 --> 00:13:11,083
As the sun warms the beaches,

170
00:13:11,163 --> 00:13:14,523
the island is transformed
into a haven once again.

171
00:13:14,603 --> 00:13:16,923
[calm music continues]

172
00:13:19,643 --> 00:13:22,923
But making it to shore was the easy part.

173
00:13:25,363 --> 00:13:28,523
Rocky's parents
now have to find their baby

174
00:13:29,283 --> 00:13:31,803
amongst thousands of others.

175
00:13:31,883 --> 00:13:34,203
[chicks chirping]

176
00:13:34,283 --> 00:13:35,803
[playful music playing]

177
00:13:42,643 --> 00:13:47,603
Up the coast, Paloma's parents
lock onto her special call…

178
00:13:47,683 --> 00:13:48,563
[Paloma chirping]

179
00:13:48,643 --> 00:13:50,763
…and quickly find her in the crowd.

180
00:13:51,363 --> 00:13:54,043
[penguins squawking]

181
00:13:58,283 --> 00:14:01,363
And finally, Rocky's parents also hear

182
00:14:01,883 --> 00:14:03,483
the unmistakable cry…

183
00:14:03,563 --> 00:14:04,763
[Rocky chirping]

184
00:14:05,643 --> 00:14:07,123
…of their little one.

185
00:14:07,203 --> 00:14:09,683
[chirping continues]

186
00:14:13,523 --> 00:14:17,643
His voice has a unique signature
only his parents can identify.

187
00:14:17,723 --> 00:14:20,203
[happy music playing]

188
00:14:21,723 --> 00:14:23,243
It's a family reunion.

189
00:14:25,283 --> 00:14:27,283
And two baby bellies

190
00:14:28,323 --> 00:14:30,243
are full at last.

191
00:14:36,483 --> 00:14:40,203
From the first stars
to the birth of our galaxy,

192
00:14:40,283 --> 00:14:42,283
Sun, and planet,

193
00:14:43,523 --> 00:14:46,763
gravity set the stage for life.

194
00:14:50,323 --> 00:14:52,363
[whooshing]

195
00:14:53,843 --> 00:14:56,163
But for Earth to become the home we know,

196
00:14:57,883 --> 00:15:01,323
gravity would need to send
a bit of chaos our way…

197
00:15:02,203 --> 00:15:05,163
[explosion rumbles]

198
00:15:05,243 --> 00:15:07,283
[penguins squawking, chirping]

199
00:15:07,363 --> 00:15:10,723
…so evolution could run riot.

200
00:15:15,123 --> 00:15:17,843
[calm music playing]

201
00:15:20,243 --> 00:15:22,043
Several months have passed.

202
00:15:23,723 --> 00:15:25,843
Rocky's now doubled in size…

203
00:15:28,043 --> 00:15:29,443
and is ready for love.

204
00:15:30,963 --> 00:15:33,723
But he won't truly be
an eligible bachelor…

205
00:15:35,763 --> 00:15:39,123
until he's become fit and handsome.

206
00:15:43,363 --> 00:15:45,643
First, a new outfit.

207
00:15:50,723 --> 00:15:53,403
Trading in his childish, fluffy feathers…

208
00:15:55,923 --> 00:15:58,243
for a shiny, waterproof coat…

209
00:16:00,963 --> 00:16:02,923
he's ready for his first swim.

210
00:16:09,283 --> 00:16:12,443
[pensive music playing]

211
00:16:16,203 --> 00:16:18,003
On the other end of the beach,

212
00:16:19,803 --> 00:16:21,843
Paloma is ready to launch as well.

213
00:16:31,603 --> 00:16:34,843
After only knowing dry land
their whole lives,

214
00:16:36,123 --> 00:16:38,523
it's an intimidating moment for both.

215
00:16:40,203 --> 00:16:42,963
[calm music playing]

216
00:16:43,043 --> 00:16:44,883
Rocky thinks he's swimming…

217
00:16:49,043 --> 00:16:51,803
but Paloma actually is.

218
00:17:03,523 --> 00:17:07,523
Rocky finally figures out
he needs to be in the water.

219
00:17:08,883 --> 00:17:10,643
[calm music continues]

220
00:17:12,723 --> 00:17:16,403
These young birds will be gone
for the next two years…

221
00:17:19,003 --> 00:17:21,643
on their own separate journeys.

222
00:17:22,723 --> 00:17:24,523
[mysterious music playing]

223
00:17:26,603 --> 00:17:29,123
There are great riches
awaiting them in the ocean…

224
00:17:32,363 --> 00:17:33,443
thanks to gravity…

225
00:17:33,523 --> 00:17:34,363
[whooshing]

226
00:17:36,403 --> 00:17:38,323
…and our nearest neighbor.

227
00:17:39,243 --> 00:17:40,963
[whooshing, rumbling]

228
00:17:41,043 --> 00:17:43,843
[dramatic music playing]

229
00:17:49,523 --> 00:17:51,803
Not long after our planet formed…

230
00:17:55,163 --> 00:17:57,683
it collided with another young world.

231
00:17:58,923 --> 00:18:01,243
[rumbling]

232
00:18:03,803 --> 00:18:05,123
[crashing]

233
00:18:13,403 --> 00:18:15,243
And out of the orbiting debris…

234
00:18:16,843 --> 00:18:19,043
[ethereal music playing]

235
00:18:21,003 --> 00:18:24,363
…gravity formed
Earth's traveling companion…

236
00:18:29,043 --> 00:18:29,883
the Moon.

237
00:18:36,723 --> 00:18:40,283
The impact knocked
the young Earth onto its side…

238
00:18:41,603 --> 00:18:44,083
-[whooshing]
-…and threw it into turmoil…

239
00:18:46,083 --> 00:18:48,843
lurching and spinning wildly.

240
00:18:52,323 --> 00:18:54,483
But over billions of years,

241
00:18:54,563 --> 00:18:58,363
the gravitational tug
of the Moon tamed the Earth.

242
00:18:59,683 --> 00:19:01,803
The Moon drifted away.

243
00:19:01,883 --> 00:19:02,883
[whooshing slows]

244
00:19:02,963 --> 00:19:05,043
Earth's rotation slowed…

245
00:19:07,443 --> 00:19:10,443
which transformed Earth's story.

246
00:19:15,243 --> 00:19:19,363
Because slower spin meant longer days…

247
00:19:22,043 --> 00:19:26,443
and, therefore, more hours
of continuous sunshine

248
00:19:26,523 --> 00:19:28,683
penetrated the oceans…

249
00:19:36,923 --> 00:19:39,203
[intriguing music playing]

250
00:19:40,163 --> 00:19:45,443
…creating the conditions
for the first life to get a foothold.

251
00:19:47,243 --> 00:19:48,963
[gurgling]

252
00:19:52,043 --> 00:19:56,203
The first step
in an underwater labyrinth of life

253
00:19:57,043 --> 00:19:59,363
that grew and grew…

254
00:19:59,443 --> 00:20:01,083
[majestic music playing]

255
00:20:03,363 --> 00:20:05,323
[dolphins squeaking]

256
00:20:05,403 --> 00:20:10,203
…eventually filling the oceans
with unimaginable wonders.

257
00:20:10,283 --> 00:20:12,843
[whale singing]

258
00:20:17,043 --> 00:20:19,323
[majestic music swells]

259
00:20:24,603 --> 00:20:28,043
Wonders that today provide
a rich ecosystem

260
00:20:29,043 --> 00:20:31,563
for two very hungry penguins…

261
00:20:35,163 --> 00:20:37,363
hundreds of kilometers apart

262
00:20:38,043 --> 00:20:39,323
in the open ocean.

263
00:20:44,083 --> 00:20:47,443
Paloma has reached the polar front…

264
00:20:52,283 --> 00:20:56,563
where the Southern Ocean
meets the warmer waters of the Atlantic,

265
00:20:56,643 --> 00:20:59,643
Pacific, and Indian Oceans.

266
00:21:02,643 --> 00:21:04,443
[ethereal music playing]

267
00:21:04,523 --> 00:21:08,203
Here, nutrients are churned up from below,

268
00:21:09,363 --> 00:21:11,763
supporting thousands of species…

269
00:21:17,043 --> 00:21:22,243
including lantern fish,
a favorite of the king penguin.

270
00:21:22,323 --> 00:21:24,763
[suspenseful music playing]

271
00:21:27,203 --> 00:21:29,083
They live deep underwater.

272
00:21:32,803 --> 00:21:34,803
But that's no problem for Paloma.

273
00:21:36,603 --> 00:21:40,443
She's able to hunt
300 meters below the surface.

274
00:21:42,283 --> 00:21:44,923
[suspenseful music continues]

275
00:22:02,883 --> 00:22:06,883
Penguins are uniquely adapted
to dive and hunt at great depth.

276
00:22:10,203 --> 00:22:14,363
But to understand how
these remarkable adaptations came about,

277
00:22:16,323 --> 00:22:21,123
you need to know what gravity
had been up to 66 million years ago.

278
00:22:21,203 --> 00:22:23,643
[ethereal music playing]

279
00:22:31,723 --> 00:22:35,403
In the cold outer reaches
of the solar system,

280
00:22:36,083 --> 00:22:39,403
millions of chunks
of ice and rock orbit the Sun.

281
00:22:42,923 --> 00:22:45,723
Most of the time,
these asteroids are no trouble.

282
00:22:54,323 --> 00:22:56,843
But sometimes they are.

283
00:23:00,763 --> 00:23:03,603
In the outer region of the asteroid belt,

284
00:23:04,883 --> 00:23:08,643
one particular rock,
ten kilometers across,

285
00:23:09,403 --> 00:23:12,723
was warmed by the Sun over millennia.

286
00:23:14,123 --> 00:23:15,843
[calm music playing]

287
00:23:16,923 --> 00:23:18,203
And bit by bit,

288
00:23:19,083 --> 00:23:25,243
the warming began to shift this asteroid,
called Chicxulub, out of its orbit…

289
00:23:28,163 --> 00:23:29,683
until gravity took hold…

290
00:23:32,043 --> 00:23:33,883
pulling it in toward the Sun…

291
00:23:38,083 --> 00:23:41,363
sending it on
a collision course with Earth…

292
00:23:41,443 --> 00:23:43,243
[suspenseful music playing]

293
00:23:43,323 --> 00:23:45,323
[whooshing]

294
00:23:48,203 --> 00:23:51,643
…at 72,000 kilometers an hour.

295
00:23:54,443 --> 00:23:56,323
[suspenseful music intensifies]

296
00:24:00,563 --> 00:24:04,883
The impact triggered
a superheated wave of plasma…

297
00:24:04,963 --> 00:24:07,403
[explosion rumbling]

298
00:24:08,403 --> 00:24:12,403
…causing wildfires and devastation
across the planet…

299
00:24:15,203 --> 00:24:16,843
blocking out the Sun.

300
00:24:16,923 --> 00:24:19,483
-[fire crackling]
-[ethereal music playing]

301
00:24:19,563 --> 00:24:23,123
Three-quarters of Earth's species
were obliterated.

302
00:24:23,963 --> 00:24:25,043
[explosion rumbling]

303
00:24:25,723 --> 00:24:28,243
It was bad news for the dinosaurs…

304
00:24:30,243 --> 00:24:33,883
but good news for the king penguin.

305
00:24:34,483 --> 00:24:37,203
[calm music playing]

306
00:24:39,883 --> 00:24:41,443
Smaller and lighter,

307
00:24:42,123 --> 00:24:44,763
birds were able to survive the impact.

308
00:24:46,963 --> 00:24:50,323
They took to the skies and diversified.

309
00:24:53,683 --> 00:24:55,683
With large predators gone…

310
00:24:58,403 --> 00:25:01,163
the oceans abounded with fish.

311
00:25:05,243 --> 00:25:09,163
The penguin's ancestors
became expert divers,

312
00:25:11,003 --> 00:25:12,283
diving deeper

313
00:25:13,403 --> 00:25:15,203
and staying down longer

314
00:25:16,763 --> 00:25:22,843
until, ultimately, they lost
the ability to fly altogether.

315
00:25:22,923 --> 00:25:25,523
[calm music continues]

316
00:25:28,923 --> 00:25:31,003
From soaring through the skies…

317
00:25:34,923 --> 00:25:37,043
to soaring through the oceans.

318
00:25:42,723 --> 00:25:45,123
Invaluable adaptations

319
00:25:45,203 --> 00:25:48,843
that Rocky and Paloma
have put to good use.

320
00:25:53,843 --> 00:25:56,363
Fitter and stronger,

321
00:25:56,443 --> 00:25:59,803
they are now ready to return
to their home shores

322
00:25:59,883 --> 00:26:01,123
in search of a mate.

323
00:26:05,243 --> 00:26:07,523
But their homecoming is interrupted…

324
00:26:07,603 --> 00:26:09,443
[ominous music playing]

325
00:26:09,523 --> 00:26:11,243
[blowhole exhales]

326
00:26:15,843 --> 00:26:16,763
…by orcas,

327
00:26:18,323 --> 00:26:21,123
the only whale known to eat penguins.

328
00:26:25,203 --> 00:26:27,923
Paloma shifts into top gear.

329
00:26:28,003 --> 00:26:29,403
[suspenseful music playing]

330
00:26:30,003 --> 00:26:31,643
[orca squeals]

331
00:26:32,923 --> 00:26:35,443
It will be a race to the finish.

332
00:26:41,083 --> 00:26:42,363
Orcas are fast.

333
00:26:42,443 --> 00:26:43,443
[blowhole exhales]

334
00:26:45,243 --> 00:26:47,883
[suspenseful music continues]

335
00:26:47,963 --> 00:26:50,523
But king penguins are built for speed.

336
00:26:50,603 --> 00:26:51,723
[blowhole exhales]

337
00:26:52,763 --> 00:26:54,003
[orca squeals]

338
00:27:12,843 --> 00:27:15,843
Paloma is too quick for her pursuer.

339
00:27:19,963 --> 00:27:24,323
But Rocky took cover
in the kelp forests near the shore.

340
00:27:25,323 --> 00:27:27,923
[ominous music playing]

341
00:27:37,403 --> 00:27:38,643
[orca squeals]

342
00:27:38,723 --> 00:27:42,243
And the hungry orca isn't going anywhere.

343
00:27:48,523 --> 00:27:49,883
[suspenseful music playing]

344
00:27:49,963 --> 00:27:52,443
[orca squealing]

345
00:28:00,123 --> 00:28:01,523
Rocky sees his opening…

346
00:28:06,323 --> 00:28:07,763
and bolts for the shore.

347
00:28:07,843 --> 00:28:09,443
[suspenseful music crescendos]

348
00:28:11,243 --> 00:28:14,323
-[Rocky squawks]
-He definitely knows how to swim now.

349
00:28:17,363 --> 00:28:19,963
[calm music playing]

350
00:28:20,043 --> 00:28:23,603
Two long years roaming the sea,

351
00:28:24,323 --> 00:28:27,443
all for a chance
to enter the great lottery.

352
00:28:29,163 --> 00:28:31,443
The search for love.

353
00:28:34,363 --> 00:28:38,803
Gravity shaped the Sun, Earth, and Moon…

354
00:28:41,443 --> 00:28:44,203
creating a stable home
for life on our planet

355
00:28:45,243 --> 00:28:48,523
and steering evolution in new directions.

356
00:28:48,603 --> 00:28:50,803
[whooshing]

357
00:28:50,883 --> 00:28:52,123
[explosion rumbles]

358
00:28:56,723 --> 00:29:00,723
But the ballad of Rocky and Paloma
needs one more part…

359
00:29:01,843 --> 00:29:03,163
[fire crackling]

360
00:29:03,243 --> 00:29:04,643
…created by gravity

361
00:29:06,283 --> 00:29:08,483
in the fiery heart of the Sun.

362
00:29:09,243 --> 00:29:11,443
[crackling intensifies]

363
00:29:12,083 --> 00:29:12,963
Light.

364
00:29:14,443 --> 00:29:16,643
[whooshing]

365
00:29:17,283 --> 00:29:19,603
Our star only shines because,

366
00:29:19,683 --> 00:29:23,723
at its center,
an intense battle is taking place.

367
00:29:23,803 --> 00:29:26,243
[zapping]

368
00:29:28,083 --> 00:29:29,763
Gravity pulls inward…

369
00:29:31,763 --> 00:29:35,243
while intense pressure pushes back.

370
00:29:37,123 --> 00:29:39,483
[ethereal ringing]

371
00:29:41,843 --> 00:29:43,643
This gravitational war….

372
00:29:44,523 --> 00:29:47,523
[zapping, whooshing]

373
00:29:48,523 --> 00:29:51,683
…causes atoms to collide and fuse…

374
00:29:51,763 --> 00:29:54,043
[whooshing rapidly]

375
00:29:58,043 --> 00:30:00,443
…releasing tiny pockets of energy…

376
00:30:00,523 --> 00:30:02,203
[zapping]

377
00:30:02,283 --> 00:30:05,123
…in the form of photons…

378
00:30:05,723 --> 00:30:08,443
[sizzling, whooshing]

379
00:30:12,363 --> 00:30:15,923
…that not only shower the Earth
with life-sustaining energy…

380
00:30:18,283 --> 00:30:22,323
but also bathe it in light.

381
00:30:22,403 --> 00:30:24,883
[ethereal music playing]

382
00:30:26,963 --> 00:30:30,003
Light that contains
its own hidden wonders.

383
00:30:33,043 --> 00:30:35,843
Because within every sunbeam

384
00:30:36,963 --> 00:30:38,083
is a rainbow.

385
00:30:41,443 --> 00:30:44,203
Each photon has a unique wavelength

386
00:30:45,483 --> 00:30:48,643
and interacts with the stuff
our world is made of

387
00:30:49,163 --> 00:30:50,363
in a different way.

388
00:30:52,883 --> 00:30:54,603
[penguins squawking]

389
00:31:01,923 --> 00:31:04,683
Some wavelengths are absorbed.

390
00:31:06,203 --> 00:31:08,723
Others are reflected.

391
00:31:08,803 --> 00:31:11,123
[ethereal tinkling]

392
00:31:12,803 --> 00:31:18,043
How these light waves hit our eyes
determines what colors we see.

393
00:31:22,443 --> 00:31:24,883
And this ability to perceive color

394
00:31:25,723 --> 00:31:29,723
plays a key role
in the penguin dating game.

395
00:31:30,883 --> 00:31:33,283
[intriguing music playing]

396
00:31:33,363 --> 00:31:36,243
[squawking]

397
00:31:39,243 --> 00:31:43,523
Years of feasting at sea
have made Rocky fit and strong.

398
00:31:44,483 --> 00:31:47,563
[penguins squawking]

399
00:31:48,163 --> 00:31:51,443
Traits he needs to display
to attract a mate.

400
00:31:52,483 --> 00:31:55,683
[squawking continues]

401
00:31:58,243 --> 00:32:01,243
Pigments that he synthesized himself

402
00:32:02,403 --> 00:32:04,843
color his feathers brilliant yellow…

403
00:32:07,043 --> 00:32:09,523
perfect for showing off his own flair

404
00:32:11,403 --> 00:32:16,843
and attracting the gaze
of the one bird in this crowd…

405
00:32:22,043 --> 00:32:25,643
-[penguin chirping]
-…who only has eyes for him.

406
00:32:29,843 --> 00:32:30,683
Paloma.

407
00:32:37,123 --> 00:32:38,643
[ethereal tinkling]

408
00:32:38,723 --> 00:32:40,083
[whooshing]

409
00:32:40,163 --> 00:32:42,523
[ethereal humming]

410
00:32:44,563 --> 00:32:48,723
Starlight reflects onto the retina
at the back of Paloma's eye.

411
00:32:48,803 --> 00:32:51,283
[intriguing music continues]

412
00:32:55,043 --> 00:32:58,323
Here, millions of cone cells get to work

413
00:32:58,403 --> 00:33:00,523
decoding every wavelength…

414
00:33:00,603 --> 00:33:02,963
[ethereal squeaking]

415
00:33:07,043 --> 00:33:12,243
…which allows Paloma
to distinguish one color from another.

416
00:33:13,243 --> 00:33:14,563
[whooshing]

417
00:33:16,523 --> 00:33:17,883
In the blink of an eye,

418
00:33:18,403 --> 00:33:22,643
these lovebirds
are not only able to see their world

419
00:33:23,683 --> 00:33:26,323
but also understand it

420
00:33:27,843 --> 00:33:30,323
and find their soulmate.

421
00:33:30,403 --> 00:33:32,083
[playful music playing]

422
00:33:36,883 --> 00:33:40,883
The courting then turns
to a carefully choreographed dance.

423
00:33:42,243 --> 00:33:43,643
[penguin chattering]

424
00:33:43,723 --> 00:33:46,523
Each displaying
their dazzling, yellow feathers…

425
00:33:50,963 --> 00:33:52,323
for the other to admire.

426
00:33:52,403 --> 00:33:54,843
[playful music continues]

427
00:33:58,923 --> 00:34:02,323
[penguins squawking]

428
00:34:03,643 --> 00:34:05,643
Other suitors try their luck

429
00:34:05,723 --> 00:34:07,043
but to no avail.

430
00:34:08,843 --> 00:34:11,803
[playful music continues]

431
00:34:12,643 --> 00:34:14,403
Because Rocky's yellow feathers…

432
00:34:16,603 --> 00:34:18,403
aren't his only selling point.

433
00:34:20,043 --> 00:34:22,203
[ethereal tinkling]

434
00:34:22,283 --> 00:34:23,563
By shaking his head…

435
00:34:26,323 --> 00:34:28,323
he encodes a secret message…

436
00:34:30,723 --> 00:34:32,723
in ultraviolet light.

437
00:34:35,163 --> 00:34:37,283
His beak catches the Sun

438
00:34:39,043 --> 00:34:40,763
and reflects its rays.

439
00:34:41,283 --> 00:34:43,123
[ethereal tinkling continues]

440
00:34:44,403 --> 00:34:45,403
[whooshing]

441
00:34:47,243 --> 00:34:49,403
And thanks to an extra cone cell…

442
00:34:49,483 --> 00:34:50,683
[whooshing]

443
00:34:51,803 --> 00:34:56,683
…Rocky and Paloma's eyes
can see colors beyond our own.

444
00:34:58,283 --> 00:35:02,163
These UV signals win Paloma over.

445
00:35:04,083 --> 00:35:05,923
They're the perfect match.

446
00:35:06,003 --> 00:35:08,603
[calm music playing]

447
00:35:11,603 --> 00:35:12,803
[chick chirping]

448
00:35:12,883 --> 00:35:16,043
Raising a penguin chick is a grueling task

449
00:35:17,923 --> 00:35:21,523
that requires both parents
to be in top form.

450
00:35:26,363 --> 00:35:29,803
Impressive yellow feathers
and a flashy beak

451
00:35:29,883 --> 00:35:32,843
are proof of strength and ability,

452
00:35:34,363 --> 00:35:38,083
essential characteristics
when it comes to bringing up a family.

453
00:35:41,403 --> 00:35:44,163
From all the thousands of other birds,

454
00:35:45,043 --> 00:35:46,883
Rocky and Paloma…

455
00:35:49,683 --> 00:35:51,323
have found each other.

456
00:35:52,963 --> 00:35:54,603
[whooshing]

457
00:35:58,243 --> 00:36:00,843
[ethereal music playing]

458
00:36:00,923 --> 00:36:03,523
From the first ripples in the cosmic web…

459
00:36:04,323 --> 00:36:06,523
[rumbling]

460
00:36:09,603 --> 00:36:11,283
…to the birth of our Sun…

461
00:36:13,723 --> 00:36:14,603
planet,

462
00:36:15,883 --> 00:36:16,763
and Moon…

463
00:36:18,763 --> 00:36:20,443
[rumbling]

464
00:36:21,723 --> 00:36:25,043
…the impacts
that have written Earth's history…

465
00:36:25,763 --> 00:36:27,763
[fire crackling]

466
00:36:27,843 --> 00:36:33,203
…to the force that powers the Sun,
painting our world in color…

467
00:36:35,323 --> 00:36:40,323
gravity has had a hand in all of it…

468
00:36:44,243 --> 00:36:48,243
guiding these two penguins
to their special moment…

469
00:36:48,803 --> 00:36:51,883
[majestic music playing]

470
00:36:51,963 --> 00:36:54,123
…on this special island…

471
00:36:58,283 --> 00:37:02,163
where it's not long
before something extra special

472
00:37:02,243 --> 00:37:03,683
is delivered to Earth.

473
00:37:03,763 --> 00:37:04,763
[Paloma moaning]

474
00:37:04,843 --> 00:37:09,803
Rocky and Paloma are going
to be parents themselves.

475
00:37:10,403 --> 00:37:13,643
[chick chirping]

476
00:37:13,723 --> 00:37:15,483
Ushering in a new life

477
00:37:16,203 --> 00:37:19,123
and maybe even new romance…

478
00:37:21,923 --> 00:37:25,763
with gravity, as ever,
helping to lead the way.

479
00:37:28,523 --> 00:37:31,083
[ethereal music playing]

480
00:37:33,923 --> 00:37:35,483
All across the Earth,

481
00:37:36,483 --> 00:37:38,923
life is dazzling in its variety.

482
00:37:41,483 --> 00:37:43,003
[chimpanzee hooting]

483
00:37:43,083 --> 00:37:46,323
-["What a Wonderful World" playing]
-♪ I see skies of blue ♪

484
00:37:47,563 --> 00:37:49,723
♪ And clouds of white ♪

485
00:37:50,723 --> 00:37:52,843
♪ The bright blessed day ♪

486
00:37:53,403 --> 00:37:55,923
♪ The dark sacred night ♪

487
00:37:56,003 --> 00:37:59,323
♪ And I think to myself ♪

488
00:38:00,923 --> 00:38:04,483
♪ What a wonderful world ♪

489
00:38:04,563 --> 00:38:07,563
[Freeman] It has taken 13.8 billion years

490
00:38:07,643 --> 00:38:10,923
to reach this one precious moment

491
00:38:11,003 --> 00:38:13,723
in time and space.

492
00:38:14,603 --> 00:38:16,723
[zapping, whooshing]

493
00:38:16,803 --> 00:38:18,683
[majestic music playing]

494
00:38:19,843 --> 00:38:21,523
[rumbling, exploding]

495
00:38:22,563 --> 00:38:25,763
Every animal made from the stars…

496
00:38:27,763 --> 00:38:29,843
synchronized with the planet,

497
00:38:31,483 --> 00:38:34,763
and sustained by gifts from the cosmos

498
00:38:34,843 --> 00:38:38,443
that only made it here by pure chance.

499
00:38:39,243 --> 00:38:42,483
♪ I hear babies cry ♪

500
00:38:43,483 --> 00:38:45,603
♪ I watch them grow ♪

501
00:38:46,443 --> 00:38:49,043
♪ They'll learn much more ♪

502
00:38:49,563 --> 00:38:51,843
♪ Than I'll never know ♪

503
00:38:52,363 --> 00:38:53,963
All held in its place

504
00:38:54,043 --> 00:38:55,163
by the ultimate,

505
00:38:56,083 --> 00:38:59,003
the original force of attraction.

506
00:39:07,363 --> 00:39:09,563
The story of our universe

507
00:39:09,643 --> 00:39:14,483
is the story of how life came
to be here on this planet…

508
00:39:14,563 --> 00:39:17,403
♪ Yes, I think to myself ♪

509
00:39:17,923 --> 00:39:19,443
…we call home.

510
00:39:19,523 --> 00:39:23,043
♪ What a wonderful world ♪

511
00:39:23,123 --> 00:39:27,163
A story that is still being written.

512
00:39:27,243 --> 00:39:28,123
[whooshing]

513
00:39:31,803 --> 00:39:34,363
[dramatic music playing]