1
00:00:07,080 --> 00:00:09,440
<i>[ethereal music playing]</i>

2
00:00:16,120 --> 00:00:17,560
<i>[birds chirping]</i>

3
00:00:17,640 --> 00:00:18,920
<i>[Freeman]</i> The universe</i><i>...</i>

4
00:00:19,000 --> 00:00:20,080
<i>[calf whines]</i>

5
00:00:20,160 --> 00:00:22,000
<i>...</i>has provided our planet</i>

6
00:00:22,080 --> 00:00:25,200
<i>with all the ingredients
needed for life to emerge...</i>

7
00:00:25,280 --> 00:00:26,160
<i>[whooshing]</i>

8
00:00:26,240 --> 00:00:27,360
<i>...and flourish.</i>

9
00:00:29,520 --> 00:00:31,440
<i>The energy flowing through us</i>.</i>

10
00:00:36,480 --> 00:00:38,520
<i>The daily rhythms we follow.</i>

11
00:00:38,600 --> 00:00:40,000
<i>[cub yowls]</i>

12
00:00:40,080 --> 00:00:41,320
<i>[zapping]</i>

13
00:00:41,400 --> 00:00:43,880
<i>[Freeman]</i> The elements we are made of.</i>

14
00:00:47,280 --> 00:00:49,800
<i>But behind all these wonders</i>...</i>

15
00:00:49,880 --> 00:00:50,840
<i>[ethereal tinkling]</i>

16
00:00:50,920 --> 00:00:52,840
<i>...</i>lies a mysterious force</i><i>...</i>

17
00:00:55,080 --> 00:00:55,960
<i>[exploding]</i>

18
00:00:56,040 --> 00:00:58,520
<i>...</i>that makes all of this possible.</i>

19
00:00:58,600 --> 00:01:00,000
<i>[exploding]</i>

20
00:01:01,040 --> 00:01:01,920
<i>Gravity.</i>

21
00:01:08,600 --> 00:01:10,880
<i>It holds everything in place.</i>

22
00:01:15,760 --> 00:01:17,480
<i>It builds every star...</i>

23
00:01:18,640 --> 00:01:19,880
<i>[rumbling]</i>

24
00:01:20,600 --> 00:01:22,240
<i>...</i>and shapes every planet.</i>

25
00:01:23,240 --> 00:01:25,720
<i>[whooshing]</i>

26
00:01:26,480 --> 00:01:28,600
<i>And guides every life.</i>

27
00:01:31,000 --> 00:01:33,400
<i>It's the ultimate force of attraction.</i>

28
00:01:34,520 --> 00:01:35,400
<i>[penguin squawks]</i>

29
00:01:35,480 --> 00:01:40,240
<i>So profound,
it will bring two young souls together</i>...</i>

30
00:01:42,680 --> 00:01:45,880
<i>in their search for the perfect mate.</i>

31
00:01:48,120 --> 00:01:50,600
<i>[dramatic music playing]</i>

32
00:02:13,720 --> 00:02:18,880
<i>In the Southern Ocean,
over 2,000 kilometers from Antarctica...</i>

33
00:02:18,960 --> 00:02:21,600
<i>[majestic music playing]</i>

34
00:02:21,680 --> 00:02:25,320
<i>...lies the windswept island
of South Georgia.</i>

35
00:02:25,400 --> 00:02:27,880
<i>[penguins squawking]</i>

36
00:02:29,920 --> 00:02:31,440
<i>Home to a colony</i>

37
00:02:32,840 --> 00:02:35,480
<i>of half a million king penguins.</i>

38
00:02:35,560 --> 00:02:37,080
<i>[squawking continues]</i>

39
00:02:44,080 --> 00:02:47,080
<i>And it's a big day for two of them.</i>

40
00:02:52,600 --> 00:02:53,600
<i>New parents.</i>

41
00:02:59,040 --> 00:03:00,680
<i>For over 50 days...</i>

42
00:03:03,400 --> 00:03:07,480
<i>they've been taking turns
keeping their precious cargo safe</i>...</i>

43
00:03:08,560 --> 00:03:10,840
<i>[penguins squawking loudly]</i>

44
00:03:10,920 --> 00:03:12,240
<i>...and warm.</i>

45
00:03:14,920 --> 00:03:19,520
<i>And today, it's time
to welcome their baby son into the world.</i>

46
00:03:22,080 --> 00:03:25,160
<i>[chick chirping]</i>

47
00:03:25,240 --> 00:03:28,200
<i>[calm music playing]</i>

48
00:03:30,800 --> 00:03:31,680
<i>Little Rocky...</i>

49
00:03:35,080 --> 00:03:36,960
<i>meet big world.</i>

50
00:03:44,920 --> 00:03:47,440
<i>And on the other side of the island,</i>

51
00:03:48,320 --> 00:03:50,840
<i>another little chick is stepping out.</i>

52
00:03:53,080 --> 00:03:54,200
<i>[chick chirping]</i>

53
00:03:54,720 --> 00:03:55,880
<i>A girl.</i>

54
00:03:57,200 --> 00:03:58,120
<i>Paloma.</i>

55
00:03:58,800 --> 00:04:00,080
<i>[chirping continues]</i>

56
00:04:04,920 --> 00:04:09,240
<i>Rocky and Paloma don't know it yet,
but they are destined for each other.</i>

57
00:04:10,480 --> 00:04:12,880
<i>[calm music continues]</i>

58
00:04:20,800 --> 00:04:24,120
<i>A force of attraction beyond their control</i>

59
00:04:25,520 --> 00:04:27,080
<i>will bring them together.</i>

60
00:04:31,760 --> 00:04:33,000
<i>[chirping continues]</i>

61
00:04:34,480 --> 00:04:35,840
<i>[dramatic music building]</i>

62
00:04:35,920 --> 00:04:40,600
<i>This force not only hugs
Rocky and Paloma firmly to the ground...</i>

63
00:04:43,320 --> 00:04:44,480
<i>[chirping]</i>

64
00:04:45,800 --> 00:04:48,680
<i>...</i>it hugs our atmosphere to the planet.</i>

65
00:04:55,000 --> 00:04:57,000
<i>It keeps Earth orbiting the Sun...</i>

66
00:04:57,960 --> 00:05:00,360
<i>[whooshing]</i>

67
00:05:03,040 --> 00:05:08,160
<i>...the Sun rotating
around the center of our galaxy...</i>

68
00:05:08,240 --> 00:05:09,840
<i>[whooshing]</i>

69
00:05:09,920 --> 00:05:14,200
<i>...and galaxies dancing
and swirling around each other</i>

70
00:05:16,040 --> 00:05:18,280
<i>on the grandest of scales.</i>

71
00:05:21,720 --> 00:05:25,360
<i>Gravity holds all the pieces
of our universe together,</i>

72
00:05:26,600 --> 00:05:28,040
<i>connecting everything...</i>

73
00:05:28,640 --> 00:05:29,840
<i>[whooshing]</i>

74
00:05:31,600 --> 00:05:33,960
<i>...</i>from the most distant star...</i>

75
00:05:37,280 --> 00:05:38,560
<i>[whooshing]</i>

76
00:05:41,640 --> 00:05:43,280
<i>...</i>to the tiniest penguin.</i>

77
00:05:47,680 --> 00:05:52,400
<i>But Rocky and Paloma aren't thinking
about their place in the cosmos...</i>

78
00:05:54,880 --> 00:05:56,360
<i>[chick chirping]</i>

79
00:05:56,440 --> 00:05:57,920
<i>...just their next meal.</i>

80
00:05:59,040 --> 00:06:01,000
<i>[playful music playing]</i>

81
00:06:03,960 --> 00:06:07,160
<i>It's taking all the efforts
of their devoted parents</i>...</i>

82
00:06:09,840 --> 00:06:12,400
<i>to feed their insatiable appetites.</i>

83
00:06:20,960 --> 00:06:22,080
<i>It's a thankless...</i>

84
00:06:25,520 --> 00:06:27,040
<i>and never-ending task.</i>

85
00:06:29,880 --> 00:06:32,280
<i>[chirping continues]</i>

86
00:06:33,560 --> 00:06:36,880
<i>[penguins squawking]</i>

87
00:06:42,640 --> 00:06:47,120
<i>They're doing everything they can
to fatten their chicks in time for winter.</i>

88
00:06:50,040 --> 00:06:53,120
<i>Because as Rocky and Paloma
have been growing bigger...</i>

89
00:06:55,200 --> 00:06:58,440
<i>the days have been growing shorter.</i>

90
00:07:00,720 --> 00:07:02,560
<i>[pensive music playing]</i>

91
00:07:04,280 --> 00:07:07,000
<i>Food is becoming scarce.</i>

92
00:07:10,280 --> 00:07:11,800
<i>[penguin squeaking]</i>

93
00:07:11,880 --> 00:07:14,160
<i>Their parents must leave the island...</i>

94
00:07:18,320 --> 00:07:21,480
<i>and travel hundreds of kilometers
out to sea</i>...</i>

95
00:07:23,840 --> 00:07:25,120
<i>to hunt for food...</i>

96
00:07:27,160 --> 00:07:29,400
<i>leaving their precious chicks for months</i>

97
00:07:30,000 --> 00:07:32,360
<i>to fend for themselves.</i>

98
00:07:35,480 --> 00:07:37,720
<i>[solemn music playing]</i>

99
00:07:39,960 --> 00:07:43,360
<i>[Paloma crying out]</i>

100
00:07:43,440 --> 00:07:46,040
<i>Paloma's cries go unanswered...</i>

101
00:07:48,200 --> 00:07:50,880
<i>as the first, loneliest night sets in.</i>

102
00:07:50,960 --> 00:07:52,600
<i>[wind gusting]</i>

103
00:07:54,080 --> 00:07:56,880
<i>The darkest moment
in a penguin chick's life.</i>

104
00:07:58,800 --> 00:08:01,120
<i>[whooshing]</i>

105
00:08:02,480 --> 00:08:05,120
<i>[ethereal music playing]</i>

106
00:08:05,200 --> 00:08:09,680
<i>But it's nothing compared
to our universe's darkest moments...</i>

107
00:08:12,800 --> 00:08:15,480
<i>because long before there was an Earth,</i>

108
00:08:17,280 --> 00:08:18,400
<i>a Sun,</i>

109
00:08:19,640 --> 00:08:20,880
<i>or stars...</i>

110
00:08:25,520 --> 00:08:27,400
<i>there was no light at all.</i>

111
00:08:37,200 --> 00:08:41,400
<i>The universe was just
a dark, dense web of gas.</i>

112
00:08:44,240 --> 00:08:46,600
<i>[ethereal music continues]</i>

113
00:08:49,280 --> 00:08:53,280
<i>But here, gravity began to work its magic.</i>

114
00:08:56,600 --> 00:09:01,000
<i>From this gravity came everything.</i>

115
00:09:07,400 --> 00:09:09,520
<i>Parts of the web were pulled together</i>...</i>

116
00:09:12,000 --> 00:09:13,640
<i>into clumps of matter</i>...</i>

117
00:09:14,240 --> 00:09:17,080
<i>[rumbling]</i>

118
00:09:17,160 --> 00:09:19,640
<i>...that grew and grew...</i>

119
00:09:24,920 --> 00:09:29,840
<i>until they got so big,
they collapsed in on themselves...</i>

120
00:09:30,880 --> 00:09:31,920
<i>[creaking]</i>

121
00:09:32,000 --> 00:09:33,480
<i>...bursting into life...</i>

122
00:09:36,480 --> 00:09:38,600
<i>[rumbling]</i>

123
00:09:38,680 --> 00:09:42,160
<i>...as the very first stars.</i>

124
00:09:43,720 --> 00:09:46,000
<i>[zapping]</i>

125
00:09:46,080 --> 00:09:48,000
<i>[rumbling in distance]</i>

126
00:09:50,800 --> 00:09:52,160
<i>Gravity kept working,</i>

127
00:09:52,880 --> 00:09:57,440
<i>sculpting the primordial web
into more and more stars...</i>

128
00:09:59,920 --> 00:10:02,000
<i>pulling them toward each other</i>

129
00:10:03,520 --> 00:10:06,280
<i>and spinning them into vast galaxies.</i>

130
00:10:06,360 --> 00:10:08,920
<i>[majestic music playing]</i>

131
00:10:13,800 --> 00:10:14,720
<i>From nothing,</i>

132
00:10:15,680 --> 00:10:19,400
<i>gravity shaped
an entire universe of possibility...</i>

133
00:10:22,760 --> 00:10:25,800
<i>that still speckles our night sky.</i>

134
00:10:29,600 --> 00:10:31,840
<i>[calm music playing]</i>

135
00:10:31,920 --> 00:10:34,880
<i>[penguins chirping]</i>

136
00:10:35,800 --> 00:10:40,480
<i>But light from distant stars
won't keep penguin chicks warm.</i>

137
00:10:41,720 --> 00:10:43,600
<i>[ominous music playing]</i>

138
00:10:43,680 --> 00:10:45,280
<i>With their parents at sea,</i>

139
00:10:46,160 --> 00:10:49,120
<i>Rocky and Paloma are losing weight,</i>

140
00:10:50,560 --> 00:10:53,800
<i>becoming more and more vulnerable.</i>

141
00:10:53,880 --> 00:10:55,600
<i>[seagull grunting]</i>

142
00:10:55,680 --> 00:10:58,160
<i>[chick squealing]</i>

143
00:11:01,840 --> 00:11:03,720
<i>[ominous music crescendos]</i>

144
00:11:10,400 --> 00:11:12,640
<i>The chicks only refuge from the cold</i>

145
00:11:13,480 --> 00:11:14,840
<i>is their fluffy down</i>

146
00:11:16,520 --> 00:11:17,440
<i>and each other.</i>

147
00:11:17,520 --> 00:11:19,520
<i>[solemn music playing]</i>

148
00:11:19,600 --> 00:11:23,680
<i>Their survival hinges
on a precise, elegant dance</i>

149
00:11:23,760 --> 00:11:25,480
<i>between one star</i>

150
00:11:26,320 --> 00:11:27,440
<i>and one planet,</i>

151
00:11:29,320 --> 00:11:34,080
<i>choreographed by gravity
over four and a half billion years ago.</i>

152
00:11:35,200 --> 00:11:38,000
<i>[whooshing]</i>

153
00:11:39,080 --> 00:11:41,400
<i>[solemn music continues]</i>

154
00:11:43,800 --> 00:11:47,720
<i>Out of the dust and gas left over
from the formation of the Sun...</i>

155
00:11:48,240 --> 00:11:49,880
<i>[rumbling]</i>

156
00:11:51,240 --> 00:11:54,160
<i>...gravity pulled bits and pieces
of rubble together...</i>

157
00:12:00,480 --> 00:12:01,800
<i>[crashing]</i>

158
00:12:01,880 --> 00:12:05,080
<i>...molding them over time into a planet.</i>

159
00:12:05,840 --> 00:12:07,440
<i>[rumbling]</i>

160
00:12:15,920 --> 00:12:19,280
<i>It was unrecognizable
from the home we know now...</i>

161
00:12:21,720 --> 00:12:24,240
<i>but it had all the potential for life...</i>

162
00:12:28,040 --> 00:12:31,800
<i>bathed in the glow of our newborn Sun.</i>

163
00:12:36,520 --> 00:12:41,400
<i>That same Sun,
billions of years later, is now rising...</i>

164
00:12:43,680 --> 00:12:45,040
<i>[calm music playing]</i>

165
00:12:45,640 --> 00:12:49,080
<i>...signaling to Rocky and Paloma's parents</i>,</i>

166
00:12:49,960 --> 00:12:52,560
<i>it's time to return to South Georgia...</i>

167
00:12:56,960 --> 00:13:01,080
<i>with their bellies full of fish.</i>

168
00:13:01,160 --> 00:13:02,880
<i>[penguins squawking]</i>

169
00:13:08,600 --> 00:13:11,040
<i>As the sun warms the beaches,</i>

170
00:13:11,120 --> 00:13:14,480
<i>the island is transformed
into a haven once again.</i>

171
00:13:14,560 --> 00:13:16,880
<i>[calm music continues]</i>

172
00:13:19,600 --> 00:13:22,880
<i>But making it to shore was the easy part.</i>

173
00:13:25,320 --> 00:13:28,480
<i>Rocky's parents
now have to find their baby</i>

174
00:13:29,240 --> 00:13:31,760
<i>amongst thousands of others.</i>

175
00:13:31,840 --> 00:13:34,160
<i>[chicks chirping]</i>

176
00:13:34,240 --> 00:13:35,760
<i>[playful music playing]</i>

177
00:13:42,600 --> 00:13:47,560
<i>Up the coast, Paloma's parents
lock onto her special call</i>...</i>

178
00:13:47,640 --> 00:13:48,520
<i>[Paloma chirping]</i>

179
00:13:48,600 --> 00:13:50,720
<i>...</i>and quickly find her in the crowd.</i>

180
00:13:51,320 --> 00:13:54,000
<i>[penguins squawking]</i>

181
00:13:58,240 --> 00:14:01,320
<i>And finally, Rocky's parents also hear</i>

182
00:14:01,840 --> 00:14:03,440
<i>the unmistakable cry...</i>

183
00:14:03,520 --> 00:14:04,720
<i>[Rocky chirping]</i>

184
00:14:05,600 --> 00:14:07,080
<i>...</i>of their little one.</i>

185
00:14:07,160 --> 00:14:09,640
<i>[chirping continues]</i>

186
00:14:13,480 --> 00:14:17,600
<i>His voice has a unique signature
only his parents can identify.</i>

187
00:14:17,680 --> 00:14:20,160
<i>[happy music playing]</i>

188
00:14:21,680 --> 00:14:23,200
<i>It's a family reunion.</i>

189
00:14:25,240 --> 00:14:27,240
<i>And two baby bellies</i>

190
00:14:28,280 --> 00:14:30,200
<i>are full at last.</i>

191
00:14:36,440 --> 00:14:40,160
<i>From the first stars
to the birth of our galaxy,</i>

192
00:14:40,240 --> 00:14:42,240
<i>Sun, and planet,</i>

193
00:14:43,480 --> 00:14:46,720
<i>gravity set the stage for life.</i>

194
00:14:50,280 --> 00:14:52,320
<i>[whooshing]</i>

195
00:14:53,800 --> 00:14:56,120
<i>But for Earth to become the home we know,</i>

196
00:14:57,840 --> 00:15:01,280
<i>gravity would need to send
a bit of chaos our way...</i>

197
00:15:02,160 --> 00:15:05,120
<i>[explosion rumbles]</i>

198
00:15:05,200 --> 00:15:07,240
<i>[penguins squawking, chirping]</i>

199
00:15:07,320 --> 00:15:10,680
<i>...so evolution could run riot.</i>

200
00:15:15,080 --> 00:15:17,800
<i>[calm music playing]</i>

201
00:15:20,200 --> 00:15:22,000
<i>Several months have passed.</i>

202
00:15:23,680 --> 00:15:25,800
<i>Rocky's now doubled in size...</i>

203
00:15:28,000 --> 00:15:29,400
<i>and is ready for love.</i>

204
00:15:30,920 --> 00:15:33,680
<i>But he won't truly be
an eligible bachelor...</i>

205
00:15:35,720 --> 00:15:39,080
<i>until he's become fit and handsome.</i>

206
00:15:43,320 --> 00:15:45,600
<i>First, a new outfit.</i>

207
00:15:50,680 --> 00:15:53,360
<i>Trading in his childish, fluffy feathers...</i>

208
00:15:55,880 --> 00:15:58,200
<i>for a shiny, waterproof coat...</i>

209
00:16:00,920 --> 00:16:02,880
<i>he's ready for his first swim.</i>

210
00:16:09,240 --> 00:16:12,400
<i>[pensive music playing]</i>

211
00:16:16,160 --> 00:16:17,960
<i>On the other end of the beach,</i>

212
00:16:19,760 --> 00:16:21,800
<i>Paloma is ready to launch as well.</i>

213
00:16:31,560 --> 00:16:34,800
<i>After only knowing dry land
their whole lives,</i>

214
00:16:36,080 --> 00:16:38,480
<i>it's an intimidating moment for both.</i>

215
00:16:40,160 --> 00:16:42,920
<i>[calm music playing]</i>

216
00:16:43,000 --> 00:16:44,840
<i>Rocky thinks he's swimming...</i>

217
00:16:49,000 --> 00:16:51,760
<i>but Paloma actually is.</i>

218
00:17:03,480 --> 00:17:07,480
<i>Rocky finally figures out
he needs to be</i> in the water.</i>

219
00:17:08,840 --> 00:17:10,600
<i>[calm music continues]</i>

220
00:17:12,680 --> 00:17:16,360
<i>These young birds will be gone
for the next two years</i>...</i>

221
00:17:18,960 --> 00:17:21,600
<i>on their own separate journeys.</i>

222
00:17:22,680 --> 00:17:24,480
<i>[mysterious music playing]</i>

223
00:17:26,560 --> 00:17:29,080
<i>There are great riches
awaiting them in the ocean...</i>

224
00:17:32,320 --> 00:17:33,400
<i>thanks to gravity...</i>

225
00:17:33,480 --> 00:17:34,320
<i>[whooshing]</i>

226
00:17:36,360 --> 00:17:38,280
<i>...</i>and our nearest neighbor.</i>

227
00:17:39,200 --> 00:17:40,920
<i>[whooshing, rumbling]</i>

228
00:17:41,000 --> 00:17:43,800
<i>[dramatic music playing]</i>

229
00:17:49,480 --> 00:17:51,760
<i>Not long after our planet formed...</i>

230
00:17:55,120 --> 00:17:57,640
<i>it collided with another young world.</i>

231
00:17:58,880 --> 00:18:01,200
<i>[rumbling]</i>

232
00:18:03,760 --> 00:18:05,080
<i>[crashing]</i>

233
00:18:13,360 --> 00:18:15,200
<i>And out of the orbiting debris...</i>

234
00:18:16,800 --> 00:18:19,000
<i>[ethereal music playing]</i>

235
00:18:20,960 --> 00:18:24,320
<i>...gravity formed
Earth's traveling companion...</i>

236
00:18:29,000 --> 00:18:29,840
<i>the Moon.</i>

237
00:18:36,680 --> 00:18:40,240
<i>The impact knocked
the young Earth onto its side...</i>

238
00:18:41,560 --> 00:18:44,040
<i>-[whooshing]
-...</i>and threw it into turmoil...</i>

239
00:18:46,040 --> 00:18:48,800
<i>lurching and spinning wildly.</i>

240
00:18:52,280 --> 00:18:54,440
<i>But over billions of years,</i>

241
00:18:54,520 --> 00:18:58,320
<i>the gravitational tug
of the Moon tamed the Earth.</i>

242
00:18:59,640 --> 00:19:01,760
<i>The Moon drifted away.</i>

243
00:19:01,840 --> 00:19:02,840
<i>[whooshing slows]</i>

244
00:19:02,920 --> 00:19:05,000
<i>Earth's rotation slowed...</i>

245
00:19:07,400 --> 00:19:10,400
<i>which transformed Earth's story.</i>

246
00:19:15,200 --> 00:19:19,320
<i>Because slower spin meant longer days...</i>

247
00:19:22,000 --> 00:19:26,400
<i>and, therefore, more hours
of continuous sunshine</i>

248
00:19:26,480 --> 00:19:28,640
<i>penetrated the oceans...</i>

249
00:19:36,880 --> 00:19:39,160
<i>[intriguing music playing]</i>

250
00:19:40,120 --> 00:19:45,400
<i>...</i>creating the conditions</i>
for the first life to get a foothold.</i>

251
00:19:47,200 --> 00:19:48,920
<i>[gurgling]</i>

252
00:19:52,000 --> 00:19:56,160
<i>The first step
in an underwater labyrinth of life</i>

253
00:19:57,000 --> 00:19:59,320
<i>that grew and grew...</i>

254
00:19:59,400 --> 00:20:01,040
<i>[majestic music playing]</i>

255
00:20:03,320 --> 00:20:05,280
<i>[dolphins squeaking]</i>

256
00:20:05,360 --> 00:20:10,160
<i>...eventually filling the oceans
with unimaginable wonders.</i>

257
00:20:10,240 --> 00:20:12,800
<i>[whale singing]</i>

258
00:20:17,000 --> 00:20:19,280
<i>[majestic music swells]</i>

259
00:20:24,560 --> 00:20:28,000
<i>Wonders that today provide
a rich ecosystem</i>

260
00:20:29,000 --> 00:20:31,520
<i>for two very hungry penguins...</i>

261
00:20:35,120 --> 00:20:37,320
<i>hundreds of kilometers apart</i>

262
00:20:38,000 --> 00:20:39,280
<i>in the open ocean.</i>

263
00:20:44,040 --> 00:20:47,400
<i>Paloma has reached the polar front...</i>

264
00:20:52,240 --> 00:20:56,520
<i>where the Southern Ocean
meets the warmer waters of the Atlantic,</i>

265
00:20:56,600 --> 00:20:59,600
<i>Pacific, and Indian Oceans.</i>

266
00:21:02,600 --> 00:21:04,400
<i>[ethereal music playing]</i>

267
00:21:04,480 --> 00:21:08,160
<i>Here, nutrients are churned up from below,</i>

268
00:21:09,320 --> 00:21:11,720
<i>supporting thousands of species...</i>

269
00:21:17,000 --> 00:21:22,200
<i>including lantern fish,
a favorite of the king penguin.</i>

270
00:21:22,280 --> 00:21:24,720
<i>[suspenseful music playing]</i>

271
00:21:27,160 --> 00:21:29,040
<i>They live deep underwater.</i>

272
00:21:32,760 --> 00:21:34,760
<i>But that's no problem for Paloma.</i>

273
00:21:36,560 --> 00:21:40,400
<i>She's able to hunt
300 meters below the surface.</i>

274
00:21:42,240 --> 00:21:44,880
<i>[suspenseful music continues]</i>

275
00:22:02,840 --> 00:22:06,840
<i>Penguins are uniquely adapted
to dive and hunt at great depth.</i>

276
00:22:10,160 --> 00:22:14,320
<i>But to understand how
these remarkable adaptations came about,</i>

277
00:22:16,280 --> 00:22:21,080
<i>you need to know what gravity
had been up to 66 million years ago.</i>

278
00:22:21,160 --> 00:22:23,600
<i>[ethereal music playing]</i>

279
00:22:31,680 --> 00:22:35,360
<i>In the cold outer reaches
of the solar system,</i>

280
00:22:36,040 --> 00:22:39,360
<i>millions of chunks
of ice and rock orbit the Sun.</i>

281
00:22:42,880 --> 00:22:45,680
<i>Most of the time,
these asteroids are no trouble.</i>

282
00:22:54,280 --> 00:22:56,800
<i>But sometimes they are.</i>

283
00:23:00,720 --> 00:23:03,560
<i>In the outer region of the asteroid belt,</i>

284
00:23:04,840 --> 00:23:08,600
<i>one particular rock,
ten kilometers across,</i>

285
00:23:09,360 --> 00:23:12,680
<i>was warmed by the Sun over millennia.</i>

286
00:23:14,080 --> 00:23:15,800
<i>[calm music playing]</i>

287
00:23:16,880 --> 00:23:18,160
<i>And bit by bit,</i>

288
00:23:19,040 --> 00:23:25,200
<i>the warming began to shift this asteroid,
called Chicxulub, out of its orbit...</i>

289
00:23:28,120 --> 00:23:29,640
<i>until gravity took hold...</i>

290
00:23:32,000 --> 00:23:33,840
<i>pulling it in toward the Sun...</i>

291
00:23:38,040 --> 00:23:41,320
<i>sending it on
a collision course with Earth...</i>

292
00:23:41,400 --> 00:23:43,200
<i>[suspenseful music playing]</i>

293
00:23:43,280 --> 00:23:45,280
<i>[whooshing]</i>

294
00:23:48,160 --> 00:23:51,600
<i>...at 72,000 kilometers an hour.</i>

295
00:23:54,400 --> 00:23:56,280
<i>[suspenseful music intensifies]</i>

296
00:24:00,520 --> 00:24:04,840
<i>The impact triggered
a superheated wave of plasma...</i>

297
00:24:04,920 --> 00:24:07,360
<i>[explosion rumbling]</i>

298
00:24:08,360 --> 00:24:12,360
<i>...causing wildfires and devastation
across the planet...</i>

299
00:24:15,160 --> 00:24:16,800
<i>blocking out the Sun.</i>

300
00:24:16,880 --> 00:24:19,440
<i>-[fire crackling]</i></i>
-<i>[ethereal music playing]</i>

301
00:24:19,520 --> 00:24:23,080
<i>Three-quarters of Earth's species
were obliterated.</i>

302
00:24:23,920 --> 00:24:25,000
<i>[explosion rumbling]</i>

303
00:24:25,680 --> 00:24:28,200
<i>It was bad news for the dinosaurs...</i>

304
00:24:30,200 --> 00:24:33,840
<i>but good news for the king penguin.</i>

305
00:24:34,440 --> 00:24:37,160
<i>[calm music playing]</i>

306
00:24:39,840 --> 00:24:41,400
<i>Smaller and lighter,</i>

307
00:24:42,080 --> 00:24:44,720
<i>birds were able to survive the impact.</i>

308
00:24:46,920 --> 00:24:50,280
<i>They took to the skies and diversified.</i>

309
00:24:53,640 --> 00:24:55,640
<i>With large predators gone...</i>

310
00:24:58,360 --> 00:25:01,120
<i>the oceans abounded with fish.</i>

311
00:25:05,200 --> 00:25:09,120
<i>The penguin's ancestors
became expert divers,</i>

312
00:25:10,960 --> 00:25:12,240
<i>diving deeper</i>

313
00:25:13,360 --> 00:25:15,160
<i>and staying down longer</i>

314
00:25:16,720 --> 00:25:22,800
<i>until, ultimately, they lost
the ability to fly altogether.</i>

315
00:25:22,880 --> 00:25:25,480
<i>[calm music continues]</i>

316
00:25:28,880 --> 00:25:30,960
<i>From soaring through the skies...</i>

317
00:25:34,880 --> 00:25:37,000
<i>to soaring through the oceans.</i>

318
00:25:42,680 --> 00:25:45,080
<i>Invaluable adaptations</i>

319
00:25:45,160 --> 00:25:48,800
<i>that Rocky and Paloma
have put to good use.</i>

320
00:25:53,800 --> 00:25:56,320
<i>Fitter and stronger,</i>

321
00:25:56,400 --> 00:25:59,760
<i>they are now ready to return
to their home shores</i>

322
00:25:59,840 --> 00:26:01,080
<i>in search of a mate.</i>

323
00:26:05,200 --> 00:26:07,480
<i>But their homecoming is interrupted...</i>

324
00:26:07,560 --> 00:26:09,400
<i>[ominous music playing]</i>

325
00:26:09,480 --> 00:26:11,200
<i>[blowhole exhales]</i>

326
00:26:15,800 --> 00:26:16,720
<i>...by orcas,</i>

327
00:26:18,280 --> 00:26:21,080
<i>the only whale known to eat penguins.</i>

328
00:26:25,160 --> 00:26:27,880
<i>Paloma shifts into top gear.</i>

329
00:26:27,960 --> 00:26:29,360
<i>[suspenseful music playing]</i>

330
00:26:29,960 --> 00:26:31,600
<i>[orca squeals]</i>

331
00:26:32,880 --> 00:26:35,400
<i>It will be a race to the finish.</i>

332
00:26:41,040 --> 00:26:42,320
<i>Orcas are fast.</i>

333
00:26:42,400 --> 00:26:43,400
<i>[blowhole exhales]</i>

334
00:26:45,200 --> 00:26:47,840
<i>[suspenseful music continues]</i>

335
00:26:47,920 --> 00:26:50,480
<i>But king penguins are built for speed.</i>

336
00:26:50,560 --> 00:26:51,680
<i>[blowhole exhales]</i>

337
00:26:52,720 --> 00:26:53,960
<i>[orca squeals]</i>

338
00:27:12,800 --> 00:27:15,800
<i>Paloma is too quick for her pursuer.</i>

339
00:27:19,920 --> 00:27:24,280
<i>But Rocky took cover
in the kelp forests near the shore.</i>

340
00:27:25,280 --> 00:27:27,880
<i>[ominous music playing]</i>

341
00:27:37,360 --> 00:27:38,600
<i>[orca squeals]</i>

342
00:27:38,680 --> 00:27:42,200
<i>And the hungry orca isn't going anywhere.</i>

343
00:27:48,480 --> 00:27:49,840
<i>[suspenseful music playing]</i>

344
00:27:49,920 --> 00:27:52,400
<i>[orca squealing]</i>

345
00:28:00,080 --> 00:28:01,480
<i>Rocky sees his opening...</i>

346
00:28:06,280 --> 00:28:07,720
<i>and bolts for the shore.</i>

347
00:28:07,800 --> 00:28:09,400
<i>[suspenseful music crescendos]</i>

348
00:28:11,200 --> 00:28:14,280
<i>-[Rocky squawks]</i>
-He definitely knows how to swim now.</i>

349
00:28:17,320 --> 00:28:19,920
<i>[calm music playing]</i>

350
00:28:20,000 --> 00:28:23,560
<i>Two long years roaming the sea,</i>

351
00:28:24,280 --> 00:28:27,400
<i>all for a chance
to enter the great lottery.</i>

352
00:28:29,120 --> 00:28:31,400
<i>The search for love.</i>

353
00:28:34,320 --> 00:28:38,760
<i>Gravity shaped the Sun, Earth, and Moon...</i>

354
00:28:41,400 --> 00:28:44,160
<i>creating a stable home
for life on our planet</i>

355
00:28:45,200 --> 00:28:48,480
<i>and steering evolution in new directions.</i>

356
00:28:48,560 --> 00:28:50,760
<i>[whooshing]</i>

357
00:28:50,840 --> 00:28:52,080
<i>[explosion rumbles]</i>

358
00:28:56,680 --> 00:29:00,680
<i>But the ballad of Rocky and Paloma
needs one more part...</i>

359
00:29:01,800 --> 00:29:03,120
<i>[fire crackling]</i>

360
00:29:03,200 --> 00:29:04,600
<i>...</i>created by gravity</i>

361
00:29:06,240 --> 00:29:08,440
<i>in the fiery heart of the Sun.</i>

362
00:29:09,200 --> 00:29:11,400
<i>[crackling intensifies]</i>

363
00:29:12,040 --> 00:29:12,920
<i>Light.</i>

364
00:29:14,400 --> 00:29:16,600
<i>[whooshing]</i>

365
00:29:17,240 --> 00:29:19,560
<i>Our star only shines because,</i>

366
00:29:19,640 --> 00:29:23,680
<i>at its center,
an intense battle is taking place.</i>

367
00:29:23,760 --> 00:29:26,200
<i>[zapping]</i>

368
00:29:28,040 --> 00:29:29,720
<i>Gravity pulls inward...</i>

369
00:29:31,720 --> 00:29:35,200
<i>while intense pressure pushes back.</i>

370
00:29:37,080 --> 00:29:39,440
<i>[ethereal ringing]</i>

371
00:29:41,800 --> 00:29:43,600
<i>This gravitational war...</i>

372
00:29:44,480 --> 00:29:47,480
<i>[zapping, whooshing]</i>

373
00:29:48,480 --> 00:29:51,640
<i>...</i>causes atoms to collide and fuse...</i>

374
00:29:51,720 --> 00:29:54,000
<i>[whooshing rapidly]</i>

375
00:29:58,000 --> 00:30:00,400
<i>...releasing tiny pockets of energy...</i>

376
00:30:00,480 --> 00:30:02,160
<i>[zapping]</i>

377
00:30:02,240 --> 00:30:05,080
<i>...in the form of photons...</i>

378
00:30:05,680 --> 00:30:08,400
<i>[sizzling, whooshing]</i>

379
00:30:12,320 --> 00:30:15,880
<i>...that not only shower the Earth
with life-sustaining energy...</i>

380
00:30:18,240 --> 00:30:22,280
<i>but also bathe it in light.</i>

381
00:30:22,360 --> 00:30:24,840
<i>[ethereal music playing]</i>

382
00:30:26,920 --> 00:30:29,960
<i>Light that contains
its own hidden wonders.</i>

383
00:30:33,000 --> 00:30:35,800
<i>Because within every sunbeam</i>

384
00:30:36,920 --> 00:30:38,040
<i>is a rainbow.</i>

385
00:30:41,400 --> 00:30:44,160
<i>Each photon has a unique wavelength</i>

386
00:30:45,440 --> 00:30:48,600
<i>and interacts with the stuff
our world is made of</i>

387
00:30:49,120 --> 00:30:50,320
<i>in a different way.</i>

388
00:30:52,840 --> 00:30:54,560
<i>[penguins squawking]</i>

389
00:31:01,880 --> 00:31:04,640
<i>Some wavelengths are absorbed.</i>

390
00:31:06,160 --> 00:31:08,680
<i>Others are reflected.</i>

391
00:31:08,760 --> 00:31:11,080
<i>[ethereal tinkling]</i>

392
00:31:12,760 --> 00:31:18,000
<i>How these light waves hit our eyes
determines what colors we see.</i>

393
00:31:22,400 --> 00:31:24,840
<i>And this ability to perceive color</i>

394
00:31:25,680 --> 00:31:29,680
<i>plays a key role
in the penguin dating game.</i>

395
00:31:30,840 --> 00:31:33,240
<i>[intriguing music playing]</i>

396
00:31:33,320 --> 00:31:36,200
<i>[squawking]</i>

397
00:31:39,200 --> 00:31:43,480
<i>Years of feasting at sea
have made Rocky fit and strong.</i>

398
00:31:44,440 --> 00:31:47,520
<i>[penguins squawking]</i>

399
00:31:48,120 --> 00:31:51,400
<i>Traits he needs to display
to attract a mate.</i>

400
00:31:52,440 --> 00:31:55,640
<i>[squawking continues]</i>

401
00:31:58,200 --> 00:32:01,200
<i>Pigments that he synthesized himself</i>

402
00:32:02,360 --> 00:32:04,800
<i>color his feathers brilliant yellow...</i>

403
00:32:07,000 --> 00:32:09,480
<i>perfect for showing off his own flair</i>

404
00:32:11,360 --> 00:32:16,800
<i>and attracting the gaze
of the one bird in this crowd...</i>

405
00:32:22,000 --> 00:32:25,600
<i>-[penguin chirping]</i>
-...who only has eyes for him.</i>

406
00:32:29,800 --> 00:32:30,640
<i>Paloma.</i>

407
00:32:37,080 --> 00:32:38,600
<i>[ethereal tinkling]</i>

408
00:32:38,680 --> 00:32:40,040
<i>[whooshing]</i>

409
00:32:40,120 --> 00:32:42,480
<i>[ethereal humming]</i>

410
00:32:44,520 --> 00:32:48,680
<i>Starlight reflects onto the retina
at the back of Paloma's eye.</i>

411
00:32:48,760 --> 00:32:51,240
<i>[intriguing music continues]</i>

412
00:32:55,000 --> 00:32:58,280
<i>Here, millions of cone cells get to work</i>

413
00:32:58,360 --> 00:33:00,480
<i>decoding every wavelength...</i>

414
00:33:00,560 --> 00:33:02,920
<i>[ethereal squeaking]</i>

415
00:33:07,000 --> 00:33:12,200
<i>...which allows Paloma
to distinguish one color from another.</i>

416
00:33:13,200 --> 00:33:14,520
<i>[whooshing]</i>

417
00:33:16,480 --> 00:33:17,840
<i>In the blink of an eye,</i>

418
00:33:18,360 --> 00:33:22,600
<i>these lovebirds
are not only able to see their world</i>

419
00:33:23,640 --> 00:33:26,280
<i>but also understand it</i>

420
00:33:27,800 --> 00:33:30,280
<i>and find their soulmate.</i>

421
00:33:30,360 --> 00:33:32,040
<i>[playful music playing]</i>

422
00:33:36,840 --> 00:33:40,840
<i>The courting then turns
to a carefully choreographed dance.</i>

423
00:33:42,200 --> 00:33:43,600
<i>[penguin chattering]</i>

424
00:33:43,680 --> 00:33:46,480
<i>Each displaying
their dazzling, yellow feathers...</i>

425
00:33:50,920 --> 00:33:52,280
<i>for the other to admire.</i>

426
00:33:52,360 --> 00:33:54,800
<i>[playful music continues]</i>

427
00:33:58,880 --> 00:34:02,280
<i>[penguins squawking]</i>

428
00:34:03,600 --> 00:34:05,600
<i>Other suitors try their luck</i>

429
00:34:05,680 --> 00:34:07,000
<i>but to no avail.</i>

430
00:34:08,800 --> 00:34:11,760
<i>[playful music continues]</i>

431
00:34:12,600 --> 00:34:14,360
<i>Because Rocky's yellow feathers</i>...</i>

432
00:34:16,560 --> 00:34:18,360
<i>aren't his only selling point.</i>

433
00:34:20,000 --> 00:34:22,160
<i>[ethereal tinkling]</i>

434
00:34:22,240 --> 00:34:23,520
<i>By shaking his head...</i>

435
00:34:26,280 --> 00:34:28,280
<i>he encodes a secret message...</i>

436
00:34:30,680 --> 00:34:32,680
<i>in ultraviolet light.</i>

437
00:34:35,120 --> 00:34:37,240
<i>His beak catches the Sun</i>

438
00:34:39,000 --> 00:34:40,720
<i>and reflects its rays.</i>

439
00:34:41,240 --> 00:34:43,080
<i>[ethereal tinkling continues]</i>

440
00:34:44,360 --> 00:34:45,360
<i>[whooshing]</i>

441
00:34:47,200 --> 00:34:49,360
<i>And thanks to an extra cone cell...</i>

442
00:34:49,440 --> 00:34:50,640
<i>[whooshing]</i>

443
00:34:51,760 --> 00:34:56,640
<i>...Rocky and Paloma's eyes
can see colors beyond our own.</i>

444
00:34:58,240 --> 00:35:02,120
<i>These UV signals win Paloma over.</i>

445
00:35:04,040 --> 00:35:05,880
<i>They're the perfect match.</i>

446
00:35:05,960 --> 00:35:08,560
<i>[calm music playing]</i>

447
00:35:11,560 --> 00:35:12,760
<i>[chick chirping]</i>

448
00:35:12,840 --> 00:35:16,000
<i>Raising a penguin chick is a grueling task</i>

449
00:35:17,880 --> 00:35:21,480
<i>that requires both parents
to be in top form.</i>

450
00:35:26,320 --> 00:35:29,760
<i>Impressive yellow feathers
and a flashy beak</i>

451
00:35:29,840 --> 00:35:32,800
<i>are proof of strength and ability,</i>

452
00:35:34,320 --> 00:35:38,040
<i>essential characteristics
when it comes to bringing up a family.</i>

453
00:35:41,360 --> 00:35:44,120
<i>From all the thousands of other birds,</i>

454
00:35:45,000 --> 00:35:46,840
<i>Rocky and Paloma...</i>

455
00:35:49,640 --> 00:35:51,280
<i>have found each other.</i>

456
00:35:52,920 --> 00:35:54,560
<i>[whooshing]</i>

457
00:35:58,200 --> 00:36:00,800
<i>[ethereal music playing]</i>

458
00:36:00,880 --> 00:36:03,480
<i>From the first ripples in the cosmic web...</i>

459
00:36:04,280 --> 00:36:06,480
<i>[rumbling]</i>

460
00:36:09,560 --> 00:36:11,240
<i>...</i>to the birth of our Sun...</i>

461
00:36:13,680 --> 00:36:14,560
<i>planet,</i>

462
00:36:15,840 --> 00:36:16,720
<i>and Moon...</i>

463
00:36:18,720 --> 00:36:20,400
<i>[rumbling]</i>

464
00:36:21,680 --> 00:36:25,000
<i>...the impacts
that have written Earth's history...</i>

465
00:36:25,720 --> 00:36:27,720
<i>[fire crackling]</i>

466
00:36:27,800 --> 00:36:33,160
<i>...to the force that powers the Sun,
painting our world in color...</i>

467
00:36:35,280 --> 00:36:40,280
<i>gravity has had a hand in all of it...</i>

468
00:36:44,200 --> 00:36:48,200
<i>guiding these two penguins
to their special moment</i>...</i>

469
00:36:48,760 --> 00:36:51,840
<i>[majestic music playing]</i>

470
00:36:51,920 --> 00:36:54,080
<i>...on this special island...</i>

471
00:36:58,240 --> 00:37:02,120
<i>where it's not long
before something extra special</i>

472
00:37:02,200 --> 00:37:03,640
<i>is delivered to Earth.</i>

473
00:37:03,720 --> 00:37:04,720
<i>[Paloma moaning]</i>

474
00:37:04,800 --> 00:37:09,760
<i>Rocky and Paloma are going
to be parents themselves.</i>

475
00:37:10,360 --> 00:37:13,600
<i>[chick chirping]</i>

476
00:37:13,680 --> 00:37:15,440
<i>Ushering in a new life</i>

477
00:37:16,160 --> 00:37:19,080
<i>and maybe even new romance...</i>

478
00:37:21,880 --> 00:37:25,720
<i>with gravity, as ever,
helping to lead the way.</i>

479
00:37:28,480 --> 00:37:31,040
<i>[ethereal music playing]</i>

480
00:37:33,880 --> 00:37:35,440
<i>All across the Earth,</i>

481
00:37:36,440 --> 00:37:38,880
<i>life is dazzling in its variety.</i>

482
00:37:41,440 --> 00:37:42,960
<i>[chimpanzee hooting]</i>

483
00:37:43,040 --> 00:37:46,280
<i>-["What a Wonderful World" playing]</i>
-♪ I see skies of blue ♪</i>

484
00:37:47,520 --> 00:37:49,680
<i>♪ And clouds of white ♪</i>

485
00:37:50,680 --> 00:37:52,800
<i>♪ The bright blessed day ♪</i>

486
00:37:53,360 --> 00:37:55,880
<i>♪ The dark sacred night ♪</i>

487
00:37:55,960 --> 00:37:59,280
<i>♪ And I think to myself ♪</i>

488
00:38:00,880 --> 00:38:04,440
<i>♪ What a wonderful world ♪</i>

489
00:38:04,520 --> 00:38:07,520
<i>[Freeman]</i> It has taken 13.8 billion years</i>

490
00:38:07,600 --> 00:38:10,880
<i>to reach this one precious moment</i>

491
00:38:10,960 --> 00:38:13,680
<i>in time and space.</i>

492
00:38:14,560 --> 00:38:16,680
<i>[zapping, whooshing]</i>

493
00:38:16,760 --> 00:38:18,640
<i>[majestic music playing]</i>

494
00:38:19,800 --> 00:38:21,480
<i>[rumbling, exploding]</i>

495
00:38:22,520 --> 00:38:25,720
<i>Every animal made from the stars...</i>

496
00:38:27,720 --> 00:38:29,800
<i>synchronized with the planet,</i>

497
00:38:31,440 --> 00:38:34,720
<i>and sustained by gifts from the cosmos</i>

498
00:38:34,800 --> 00:38:38,400
<i>that only made it here by pure chance.</i>

499
00:38:39,200 --> 00:38:42,440
<i>♪ I hear babies cry ♪</i>

500
00:38:43,440 --> 00:38:45,560
<i>♪ I watch them grow ♪</i>

501
00:38:46,400 --> 00:38:49,000
<i>♪ They'll learn much more ♪</i>

502
00:38:49,520 --> 00:38:51,800
<i>♪ Than I'll never know ♪</i>

503
00:38:52,320 --> 00:38:53,920
<i>All held in its place</i>

504
00:38:54,000 --> 00:38:55,120
<i>by the ultimate,</i>

505
00:38:56,040 --> 00:38:58,960
<i>the original force of attraction.</i>

506
00:39:07,320 --> 00:39:09,520
<i>The story of our universe</i>

507
00:39:09,600 --> 00:39:14,440
<i>is the story of how life came
to be here on this planet...</i>

508
00:39:14,520 --> 00:39:17,360
<i>♪ Yes, I think to myself ♪</i>

509
00:39:17,880 --> 00:39:19,400
<i>...</i>we call home.</i>

510
00:39:19,480 --> 00:39:23,000
<i>♪ What a wonderful world ♪</i>

511
00:39:23,080 --> 00:39:27,120
<i>A story that is still being written.</i>

512
00:39:27,200 --> 00:39:28,080
<i>[whooshing]</i>

513
00:39:31,760 --> 00:39:34,320
<i>[dramatic music playing]</i>