Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated:
1
00:00:22,320 --> 00:00:24,160
Looking down on our planet,
2
00:00:24,280 --> 00:00:25,800
it may come as a surprise
3
00:00:25,920 --> 00:00:29,640
to find just how much of it
is blanketed in snow and ice.
4
00:00:29,760 --> 00:00:32,680
These vast frozen wildernesses
5
00:00:32,800 --> 00:00:35,920
cover more than
a fifth of the earth...
6
00:00:37,360 --> 00:00:40,000
Yet some areas are so remote
and inhospitable
7
00:00:40,120 --> 00:00:41,520
that, even today,
8
00:00:41,640 --> 00:00:43,680
the closest we've come
to exploring them
9
00:00:43,800 --> 00:00:45,520
is from space.
10
00:00:49,640 --> 00:00:51,200
More than a decade ago,
11
00:00:51,320 --> 00:00:53,440
the first series
of frozen planet
12
00:00:53,560 --> 00:00:57,160
examined life in the arctic
and the antarctic.
13
00:00:58,840 --> 00:01:01,280
In this series, we will explore
14
00:01:01,400 --> 00:01:04,440
all of earth's
frozen habitats...
15
00:01:06,240 --> 00:01:08,680
From its highest peaks,
16
00:01:08,800 --> 00:01:10,920
to its snowbound deserts...
17
00:01:14,280 --> 00:01:16,240
To deep beneath the ice.
18
00:01:19,640 --> 00:01:21,160
Between them, they contain
19
00:01:21,280 --> 00:01:24,520
an astonishing array
of animals...
20
00:01:26,760 --> 00:01:30,560
Many that are found
nowhere else on earth.
21
00:01:38,960 --> 00:01:41,640
We will watch
the extraordinary ways
22
00:01:41,760 --> 00:01:44,880
by which they manage to survive.
23
00:02:00,400 --> 00:02:01,960
Using new technology,
24
00:02:02,080 --> 00:02:04,320
such as racer drones,
25
00:02:04,440 --> 00:02:07,880
we'll gain a new insight
into their remarkable lives.
26
00:02:10,280 --> 00:02:13,840
But just as we're beginning
to understand its wildlife,
27
00:02:13,960 --> 00:02:16,720
we are recognising
an alarming truth.
28
00:02:16,840 --> 00:02:19,960
Our frozen wildernesses
are disappearing
29
00:02:20,080 --> 00:02:23,360
at faster rates
than ever before.
30
00:02:27,960 --> 00:02:30,240
And never has it been
more important
31
00:02:30,360 --> 00:02:35,560
to understand what is going on
in these icy territories.
32
00:02:44,360 --> 00:02:46,120
In this first episode,
33
00:02:46,240 --> 00:02:49,360
we will travel
from pole to pole...
34
00:02:50,840 --> 00:02:53,080
To celebrate
the precious wildlife
35
00:02:53,200 --> 00:02:57,120
foundin
our frozen wildernesses...
36
00:03:01,400 --> 00:03:03,920
And witness their wonders...
37
00:03:05,200 --> 00:03:07,920
While there is still time
to save them.
38
00:03:09,760 --> 00:03:12,720
This is frozen planet ii.
39
00:03:49,240 --> 00:03:53,000
We begin our journey
in the far south of the planet.
40
00:03:55,080 --> 00:03:56,880
After six months of darkness,
41
00:03:57,000 --> 00:03:59,160
the sun is starting to return
42
00:03:59,280 --> 00:04:02,800
to the largest frozen expanse
on earth.
43
00:04:04,240 --> 00:04:05,560
Antarctica.
44
00:04:06,880 --> 00:04:10,320
A continent almost twice
the size of Australia.
45
00:04:26,520 --> 00:04:30,640
Here, temperatures fall
to minus 80 degrees centigrade.
46
00:04:32,040 --> 00:04:34,680
It's the coldest place on earth.
47
00:04:41,640 --> 00:04:43,360
There is only one animal here
48
00:04:43,480 --> 00:04:47,280
Hardy enough
to raise its family in winter.
49
00:04:50,880 --> 00:04:52,680
The emperor penguin.
50
00:04:55,400 --> 00:04:59,560
Winds here can reach speeds
of over 100mph,
51
00:04:59,680 --> 00:05:03,600
and a chick is in real danger
of freezing to death.
52
00:05:10,320 --> 00:05:16,040
But his parents are possibly
the most devoted in all nature.
53
00:05:16,160 --> 00:05:17,680
They shield him
54
00:05:17,800 --> 00:05:20,320
from the full force
of the icy blast...
55
00:05:21,920 --> 00:05:25,520
And huddle together
to create a tight creche.
56
00:05:26,760 --> 00:05:29,440
Within it, the chicks,
remarkably,
57
00:05:29,560 --> 00:05:31,560
can maintain
their body temperature
58
00:05:31,680 --> 00:05:33,960
of 37 degrees celsius...
59
00:05:40,640 --> 00:05:43,560
Until one spring day,
60
00:05:43,680 --> 00:05:47,080
when the chicks have grown
to almost a metre tall...
61
00:05:50,800 --> 00:05:55,080
The parents simply walk away.
62
00:06:04,360 --> 00:06:07,520
Their parental duties
are complete...
63
00:06:11,040 --> 00:06:14,880
And they will never again
return to their chicks.
64
00:06:24,080 --> 00:06:27,600
As the days pass,
the chicks grow hungry.
65
00:06:36,040 --> 00:06:39,920
And their only chance of
finding a meal is out at sea.
66
00:06:41,880 --> 00:06:46,400
But that could be 30 miles away
across the frozen ocean.
67
00:06:54,080 --> 00:06:57,480
When one makes
the first bold move...
68
00:07:01,400 --> 00:07:03,400
The rest follow.
69
00:07:09,160 --> 00:07:11,520
They set off at a steady pace.
70
00:07:14,800 --> 00:07:19,360
But sliding on your belly
is an easy option.
71
00:07:24,240 --> 00:07:28,040
Out on this ever-changing
platform of the frozen sea...
72
00:07:29,200 --> 00:07:32,480
Towering walls of ice
stand in their way.
73
00:07:38,120 --> 00:07:41,520
This will require
mountaineering skills.
74
00:07:43,240 --> 00:07:47,560
Beaks come in useful
as ice picks.
75
00:07:56,640 --> 00:08:00,640
And tobogganing
is a quick way down.
76
00:08:19,520 --> 00:08:24,080
As they near the sea,
the ice becomes more unstable.
77
00:08:27,680 --> 00:08:32,000
Even the smallest crack
is met with suspicion.
78
00:08:37,440 --> 00:08:39,560
And with good reason.
79
00:08:41,120 --> 00:08:45,000
A crack can quickly turn
into a gaping chasm.
80
00:08:59,240 --> 00:09:01,240
If they can't escape,
81
00:09:01,360 --> 00:09:03,760
the panicked chicks
will be doomed.
82
00:09:23,640 --> 00:09:25,320
Made it.
83
00:09:30,840 --> 00:09:34,440
Finally, the end is in sight.
84
00:09:37,000 --> 00:09:39,000
The southern ocean.
85
00:09:44,320 --> 00:09:47,440
In some years,
the sea ice is so unstable
86
00:09:47,560 --> 00:09:50,520
that none make it
as far as this.
87
00:09:56,800 --> 00:10:00,400
These chicks are the lucky ones.
88
00:10:11,680 --> 00:10:13,800
Not the most graceful entry.
89
00:10:28,200 --> 00:10:30,960
But they are in their element.
90
00:10:32,040 --> 00:10:33,400
The sea.
91
00:10:39,360 --> 00:10:42,560
They may have endured
the toughest of upbringings,
92
00:10:42,680 --> 00:10:45,960
but now they can reap
the benefits
93
00:10:46,080 --> 00:10:48,280
of the long summer ahead,
94
00:10:48,400 --> 00:10:51,800
and feed in the richest waters
on earth.
95
00:11:17,120 --> 00:11:18,480
In winter,
96
00:11:18,600 --> 00:11:22,240
the seas around Antarctica
are so cold that they form
97
00:11:22,360 --> 00:11:25,520
a platform of ice
twice the size of Europe.
98
00:11:29,160 --> 00:11:31,080
But in summer,
99
00:11:31,200 --> 00:11:34,480
just off the shores
of the antarctic peninsula,
100
00:11:34,600 --> 00:11:38,960
the ice cover breaks up into
millions of tiny ice roes.
101
00:11:42,640 --> 00:11:45,600
It's an excellent place
for a weddell seal
102
00:11:45,720 --> 00:11:48,120
to rest up after a night's feed.
103
00:11:56,920 --> 00:11:59,200
The bay is sheltered...
104
00:12:01,160 --> 00:12:04,040
And the water calm.
105
00:12:13,800 --> 00:12:16,360
But there are great dangers
here.
106
00:12:49,680 --> 00:12:51,480
Killer whales.
107
00:12:52,560 --> 00:12:57,200
This pair of 15-year-olds
are learning what is perhaps
108
00:12:57,320 --> 00:13:00,360
the most complex
hunting technique in nature.
109
00:13:02,960 --> 00:13:05,000
After sizing up their prey...
110
00:13:07,720 --> 00:13:11,000
They assemble 30 metres away...
111
00:13:16,360 --> 00:13:18,840
And then launch an attack.
112
00:13:21,400 --> 00:13:22,680
They swim in tandem,
113
00:13:22,800 --> 00:13:25,160
synchronising
their tail beats...
114
00:13:27,480 --> 00:13:29,200
To create a wave.
115
00:13:34,280 --> 00:13:36,520
The seal is washed off...
116
00:13:39,680 --> 00:13:42,240
But it won't give up
without a fight.
117
00:14:08,040 --> 00:14:09,920
The seal has escaped...
118
00:14:11,920 --> 00:14:13,920
This time.
119
00:14:16,920 --> 00:14:19,520
But for the young killer whales,
120
00:14:19,640 --> 00:14:21,880
help is at hand.
121
00:14:24,680 --> 00:14:28,280
They live in multi-generational
family groups...
122
00:14:30,200 --> 00:14:34,720
Led by an experienced female
who can be over 100 years old.
123
00:14:38,440 --> 00:14:40,840
Helped by
her accumulated knowledge,
124
00:14:40,960 --> 00:14:44,000
the whales have become
ruthlessly efficient.
125
00:15:02,640 --> 00:15:06,080
They have a 90%
hunting success rate...
126
00:15:10,200 --> 00:15:15,680
But a killer whale
needs to eat a seal a day...
127
00:15:17,640 --> 00:15:22,200
So this 14-strong family
has a lot of hunting to do.
128
00:15:26,960 --> 00:15:28,320
Spreading out,
129
00:15:28,440 --> 00:15:33,160
they spy-hop
to search the ice roes.
130
00:15:38,920 --> 00:15:41,120
When a seal is spotted,
131
00:15:41,240 --> 00:15:45,440
the scouts alert the family
with a rallying call.
132
00:15:54,520 --> 00:15:56,000
But if they are to catch a seal
133
00:15:56,120 --> 00:15:58,560
resting on
such a large piece of ice...
134
00:16:00,080 --> 00:16:03,280
The hunters need to change
their tactics.
135
00:16:08,240 --> 00:16:12,440
This time, they produce
a sub-surface wave.
136
00:16:17,640 --> 00:16:20,040
It breaks the ice
into smaller pieces.
137
00:16:24,360 --> 00:16:27,560
But the seal still has a raft...
138
00:16:30,000 --> 00:16:34,080
And appears to be protected
from any oncoming wave.
139
00:16:37,480 --> 00:16:41,640
The matriarch whale,
however, has a plan.
140
00:16:45,960 --> 00:16:48,240
Working in a coordinated way,
141
00:16:48,360 --> 00:16:51,760
the pod push
the seal's ice platform
142
00:16:51,880 --> 00:16:53,680
into clearer water.
143
00:17:16,800 --> 00:17:20,480
The matriarch now tries
another tactic
144
00:17:20,600 --> 00:17:23,040
which will avoid injury.
145
00:17:26,280 --> 00:17:28,040
Blowing bubbles.
146
00:17:33,360 --> 00:17:36,760
They disorientate
the tiring seal...
147
00:17:43,360 --> 00:17:48,080
And the whales move in
for the kill.
148
00:17:59,720 --> 00:18:02,880
Only about 100 killer whales
in the world
149
00:18:03,000 --> 00:18:05,000
hunt using this technique.
150
00:18:09,680 --> 00:18:13,760
It's an ingenious solution
to the problem of finding prey,
151
00:18:13,880 --> 00:18:17,680
here in the most extreme
frozen habitat on earth.
152
00:18:27,440 --> 00:18:29,840
Antarctica is so cold
153
00:18:29,960 --> 00:18:33,320
because of its position
at the far south of the planet.
154
00:18:35,600 --> 00:18:37,320
But travel north...
155
00:18:37,440 --> 00:18:39,760
And you'll find other icy worlds
156
00:18:39,880 --> 00:18:43,600
that are created by altitude,
in the mountains.
157
00:18:45,880 --> 00:18:47,920
The andes in South America,
158
00:18:48,040 --> 00:18:52,200
with its 4,500 miles
of snow-covered peaks,
159
00:18:52,320 --> 00:18:55,160
is the longest range on earth.
160
00:18:59,800 --> 00:19:04,280
These high icy worlds even
exist close to the equator,
161
00:19:04,400 --> 00:19:06,960
where the sun is at its hottest,
162
00:19:07,080 --> 00:19:09,600
as on mount Kenya in Africa.
163
00:19:15,760 --> 00:19:20,480
But the highest mountains
of all stretch 1,500 miles
164
00:19:20,600 --> 00:19:23,000
across the north
of sub-tropical Asia -
165
00:19:23,120 --> 00:19:25,200
the himalaya.
166
00:19:33,480 --> 00:19:36,720
At the western end,
bordering Pakistan,
167
00:19:36,840 --> 00:19:39,040
stand the karakoram.
168
00:19:41,040 --> 00:19:45,400
They contain more peaks
over 8,000 metres high
169
00:19:45,520 --> 00:19:47,760
than any other range on earth...
170
00:19:51,960 --> 00:19:53,680
And include k2,
171
00:19:53,800 --> 00:19:57,360
which stands
over 8,600 metres tall.
172
00:20:07,040 --> 00:20:08,920
The slopes of the himalaya
173
00:20:09,040 --> 00:20:12,120
carry the greatest accumulation
of snow and ice
174
00:20:12,240 --> 00:20:14,760
outside the polar regions.
175
00:20:17,240 --> 00:20:20,520
It's an area known
as the third pole.
176
00:20:27,320 --> 00:20:29,920
But north of the himalaya,
177
00:20:30,040 --> 00:20:33,200
there are even more surprising
frozen worlds
178
00:20:33,320 --> 00:20:35,400
created by altitude.
179
00:20:40,080 --> 00:20:42,560
A remote snow-bound desert -
180
00:20:42,680 --> 00:20:44,160
the gobi.
181
00:20:52,200 --> 00:20:55,360
And beyond it,
a grassy plain that stretches
182
00:20:55,480 --> 00:20:58,520
for 5,000 miles
across Central Asia.
183
00:20:59,960 --> 00:21:02,760
It's known as the great steppe.
184
00:21:08,240 --> 00:21:10,280
Here, sheltering
from the elements
185
00:21:10,400 --> 00:21:11,800
in his Boulder den,
186
00:21:11,920 --> 00:21:14,360
is a somewhat grouchy resident.
187
00:21:20,720 --> 00:21:22,320
A pallas's cat.
188
00:21:25,120 --> 00:21:28,600
He has the densest fur
of any cat in the world.
189
00:21:34,240 --> 00:21:36,400
Nonetheless, to keep warm,
190
00:21:36,520 --> 00:21:40,160
he must catch
up to five rodents a day.
191
00:21:48,960 --> 00:21:52,200
Top of the menu are voles...
192
00:21:53,520 --> 00:21:55,480
And gerbils.
193
00:21:59,360 --> 00:22:00,840
Relative to body size,
194
00:22:00,960 --> 00:22:04,960
pallas's cats have one of
the shortest legs of any cat...
195
00:22:10,400 --> 00:22:11,960
And that helps by giving them
196
00:22:12,080 --> 00:22:14,640
a low profile when stalking.
197
00:22:16,520 --> 00:22:20,440
But it's not so good
for wading through deep snow.
198
00:22:33,560 --> 00:22:36,800
Never mind.
There are plenty more.
199
00:22:39,360 --> 00:22:42,880
He just needs to stay focused.
200
00:22:58,840 --> 00:23:02,440
Unfortunately, the longer
he's out in the snow,
201
00:23:02,560 --> 00:23:05,560
the colder his paws become.
202
00:23:14,840 --> 00:23:20,320
And he has only one way to get
the blood circulating again.
203
00:23:34,560 --> 00:23:37,080
That could be one shake
too many.
204
00:23:52,240 --> 00:23:56,240
Only one hunt in three by
a pallas's cat is successful.
205
00:23:57,480 --> 00:24:00,200
No wonder he has
the reputation of being
206
00:24:00,320 --> 00:24:03,400
the grumpiest cat in the world.
207
00:24:10,800 --> 00:24:13,640
To the north of the steppe,
in higher latitudes,
208
00:24:13,760 --> 00:24:16,600
lies yet another frozen world.
209
00:24:22,360 --> 00:24:24,800
The boreal forest.
210
00:24:27,440 --> 00:24:31,640
750 billion snow-covered trees.
211
00:24:38,600 --> 00:24:41,720
It's the largest forest
on earth,
212
00:24:41,840 --> 00:24:44,920
encircling the top of the world
213
00:24:45,040 --> 00:24:47,280
from Europe to Russia,
214
00:24:47,400 --> 00:24:49,880
and across to North America.
215
00:24:57,600 --> 00:25:01,680
At the far eastern end
of this vast siberian forest
216
00:25:01,800 --> 00:25:06,440
lies the hunting ground of one
of the world's rarest big cats.
217
00:25:20,160 --> 00:25:22,240
The siberian tiger.
218
00:25:34,040 --> 00:25:36,680
Ihegalhunfing
and destruction of its habitat
219
00:25:36,800 --> 00:25:41,160
have driven this tiger to
the very brink of extinction.
220
00:25:42,240 --> 00:25:45,760
Now fewer than 500 remain
in the wild.
221
00:25:54,960 --> 00:25:57,800
Weighing nearly 200kg,
222
00:25:57,920 --> 00:26:00,920
it's the largest
of all the big cats.
223
00:26:06,680 --> 00:26:07,760
To keep warm,
224
00:26:07,880 --> 00:26:11,840
this male must eat
10kg of meat a day...
225
00:26:15,440 --> 00:26:18,320
But in winter,
any prey remaining here...
226
00:26:19,920 --> 00:26:22,960
Is all too easily alarmed.
227
00:26:31,640 --> 00:26:35,320
He must patrol his entire
700-square-mile territory
228
00:26:35,440 --> 00:26:37,880
if he is to find enough to eat.
229
00:26:43,240 --> 00:26:45,120
His acute sense of smell
230
00:26:45,240 --> 00:26:48,000
tells him
that wild pig were here.
231
00:26:58,800 --> 00:27:03,760
He's so hungry that he would
tackle even a 150kg bear.
232
00:27:07,600 --> 00:27:10,080
But it left here months ago...
233
00:27:11,720 --> 00:27:15,200
Leaving only a faint trace
of its scent.
234
00:27:19,640 --> 00:27:22,960
In the Autumn, black bears here
escape the coming winter
235
00:27:23,080 --> 00:27:25,600
by hibernating inside caves.
236
00:27:34,360 --> 00:27:37,480
But that wouldn't stop a tiger
from trying to catch one.
237
00:27:48,000 --> 00:27:51,680
Remote cameras reveal
the bear's whereabouts.
238
00:28:00,320 --> 00:28:04,920
It retreated into the farthest
recess months ago.
239
00:28:10,120 --> 00:28:13,000
The tiger is simply too big
to reach it.
240
00:28:23,440 --> 00:28:25,920
But ready for every opportunity,
241
00:28:26,040 --> 00:28:30,360
this big cat is able to endure
the long siberian winter.
242
00:28:36,560 --> 00:28:40,280
And as long as this forest
is kept free from poachers,
243
00:28:40,400 --> 00:28:44,840
these magnificent tigers have
a good chance of surviving.
244
00:28:52,880 --> 00:28:56,680
In the northerly reaches
of the boreal forest...
245
00:28:58,080 --> 00:29:02,120
A strange phenomenon
illuminates the night sky.
246
00:29:05,440 --> 00:29:07,720
The Aurora borealis.
247
00:29:09,960 --> 00:29:13,120
Electrically charged particles
from the sun
248
00:29:13,240 --> 00:29:15,160
collide
with the earth's atmosphere,
249
00:29:15,280 --> 00:29:18,000
creating
this othennorldly display.
250
00:29:25,200 --> 00:29:26,480
Viewed from space,
251
00:29:26,600 --> 00:29:29,720
the Aurora brings light
to the frozen Poles,
252
00:29:29,840 --> 00:29:32,600
which otherwise
would remain in darkness
253
00:29:32,720 --> 00:29:34,520
for almost three months.
254
00:29:43,760 --> 00:29:46,400
This is the arctic tundra...
255
00:29:49,800 --> 00:29:53,840
Where temperatures can fall
to minus 50 degrees celsius.
256
00:29:56,240 --> 00:29:57,800
With little or no shelter,
257
00:29:57,920 --> 00:30:00,440
few animals can survive
the winter here.
258
00:30:02,520 --> 00:30:04,080
But some do.
259
00:30:11,480 --> 00:30:13,520
Muskox.
260
00:30:13,640 --> 00:30:16,080
Relics from the last ice age.
261
00:30:19,840 --> 00:30:22,160
Two layers of fur protect them
262
00:30:22,280 --> 00:30:24,920
from temperatures
of minus 30 degrees.
263
00:30:29,800 --> 00:30:32,640
This allows them
to give birth in early spring.
264
00:30:36,800 --> 00:30:41,440
At six hours old, a calf
is already able to stand...
265
00:30:47,320 --> 00:30:51,800
Ready to follow the herd in
the search for fresh grazing.
266
00:30:58,360 --> 00:31:00,880
But until they gain in strength,
267
00:31:01,000 --> 00:31:03,880
they are very vulnerable.
268
00:31:13,080 --> 00:31:14,640
They're being stalked.
269
00:31:17,960 --> 00:31:20,040
Grizzly bears.
270
00:31:34,240 --> 00:31:37,320
Weighing up to 300kg,
271
00:31:37,440 --> 00:31:41,440
they have emerged after
six months of hibernation...
272
00:31:42,560 --> 00:31:44,560
And are extremely hungry.
273
00:31:50,040 --> 00:31:53,160
One gets to within
just ten metres...
274
00:31:54,720 --> 00:31:56,040
And then attacks.
275
00:32:31,760 --> 00:32:33,720
Separated from their mothers,
276
00:32:33,840 --> 00:32:38,240
the newly born are unable
to distinguish friend...
277
00:32:39,400 --> 00:32:40,880
From foe.
278
00:32:54,120 --> 00:32:58,280
The bear instinctively kills
every calf it can.
279
00:33:03,520 --> 00:33:06,240
Only a few escape.
280
00:33:13,280 --> 00:33:16,160
But the herd is now far away...
281
00:33:20,480 --> 00:33:23,880
And he is too weak to follow.
282
00:33:45,040 --> 00:33:49,840
90% of calves do not survive
their first year.
283
00:33:53,240 --> 00:33:54,760
Even one without injury
284
00:33:54,880 --> 00:33:57,640
stands little chance
without its mother.
285
00:34:41,040 --> 00:34:42,880
Reunited.
286
00:34:49,000 --> 00:34:52,240
If just a few calves survive
to adulthood,
287
00:34:52,360 --> 00:34:56,000
the future of the herd
will be secure.
288
00:35:12,000 --> 00:35:15,160
North of the tundra
lies the arctic ocean,
289
00:35:15,280 --> 00:35:17,920
surrounded by three continents -
290
00:35:18,040 --> 00:35:21,560
Europe, North America and Asia.
291
00:35:23,920 --> 00:35:27,840
In winter, it remains
almost entirely frozen.
292
00:35:31,960 --> 00:35:34,360
But as the spring sunshine
finally reaches
293
00:35:34,480 --> 00:35:36,840
the northernmost part
of the planet,
294
00:35:36,960 --> 00:35:40,240
the sea ice begins to break up.
295
00:35:42,720 --> 00:35:46,000
This marks the start
of the breeding season
296
00:35:46,120 --> 00:35:49,520
for male hooded seals.
297
00:36:01,320 --> 00:36:02,960
When they're six years old,
298
00:36:03,080 --> 00:36:07,000
the males develop
an inflatable nose.
299
00:36:09,920 --> 00:36:13,360
They're ready to breed,
and the bigger their nose,
300
00:36:13,480 --> 00:36:16,880
the more attractive
they will be to a female.
301
00:36:18,120 --> 00:36:21,800
And now this one
is eager to prove it.
302
00:36:36,800 --> 00:36:39,760
A female has just given birth.
303
00:36:44,320 --> 00:36:46,800
A mother spends a mere four days
304
00:36:46,920 --> 00:36:48,640
feeding milk to her pup...
305
00:36:51,640 --> 00:36:54,120
And then, and only then,
306
00:36:54,240 --> 00:36:56,760
will she be ready to mate again.
307
00:36:59,640 --> 00:37:03,640
That is too long
for an impatient youngster
308
00:37:03,760 --> 00:37:04,960
to wait around.
309
00:37:18,040 --> 00:37:21,440
These females seem
to have been claimed
310
00:37:21,560 --> 00:37:23,200
by a larger male...
311
00:37:24,560 --> 00:37:28,120
But if this youngster
is to breed this year,
312
00:37:28,240 --> 00:37:29,680
it's worth a try.
313
00:37:39,320 --> 00:37:42,760
An inflatable nose
can also be used
314
00:37:42,880 --> 00:37:44,920
to intimidate a rival.
315
00:37:46,880 --> 00:37:50,000
His bravado pays off.
316
00:37:55,160 --> 00:37:58,800
He must now woo
the receptive female.
317
00:38:17,280 --> 00:38:19,160
She seems unimpressed...
318
00:38:21,960 --> 00:38:24,680
But he has another trick.
319
00:38:34,040 --> 00:38:39,320
He has an expandable sac
within his left nostril.
320
00:38:53,480 --> 00:38:55,040
What is her verdict?
321
00:39:02,880 --> 00:39:04,680
A sharp nip on the tail.
322
00:39:08,600 --> 00:39:11,400
And that means no.
323
00:39:17,160 --> 00:39:19,800
With only one day in the year
in which to mate,
324
00:39:19,920 --> 00:39:22,840
the female
is understandably choosy...
325
00:39:26,680 --> 00:39:28,720
And until the youngster
has grown
326
00:39:28,840 --> 00:39:30,960
a more impressive balloon,
327
00:39:31,080 --> 00:39:33,120
he's unlikely to be chosen.
328
00:39:35,520 --> 00:39:38,480
No wonder he's deflated.
329
00:39:47,120 --> 00:39:50,320
The spring not only transforms
the ocean,
330
00:39:50,440 --> 00:39:52,920
it also triggers
an important event
331
00:39:53,040 --> 00:39:55,840
on the biggest
of the arctic's islands.
332
00:39:58,240 --> 00:39:59,520
Greenland.
333
00:39:59,640 --> 00:40:02,120
Over 1,600 miles long.
334
00:40:09,320 --> 00:40:13,280
It's covered
by a single gigantic ice sheet,
335
00:40:13,400 --> 00:40:15,720
the largest
in the northern hemisphere.
336
00:40:22,920 --> 00:40:26,680
As spring advances,
the surface of the ice melts,
337
00:40:26,800 --> 00:40:29,600
forming crystal-clear lakes...
338
00:40:30,880 --> 00:40:32,960
Up to five miles wide.
339
00:40:38,240 --> 00:40:41,040
Climate change is bringing
higher temperatures,
340
00:40:41,160 --> 00:40:44,200
so there is
more and more meltwater.
341
00:40:46,280 --> 00:40:50,040
It drains down into
the mile-thick ice sheet...
342
00:40:51,520 --> 00:40:55,720
And a whole chain of events
is then triggered.
343
00:40:57,600 --> 00:41:00,320
Time-lapse photography
from space
344
00:41:00,440 --> 00:41:02,400
reveals what happens next.
345
00:41:10,640 --> 00:41:12,560
The increased meltwater
346
00:41:12,680 --> 00:41:16,400
accelerates the ice sheet's
slide downhill.
347
00:41:27,800 --> 00:41:29,960
Eventually,
it reaches the ocean.
348
00:42:15,520 --> 00:42:18,080
Here, it breaks up
into icebergs,
349
00:42:18,200 --> 00:42:21,960
some taller
than the empire state building.
350
00:42:55,280 --> 00:42:57,480
Greenland is losing its ice
351
00:42:57,600 --> 00:43:01,480
six times faster today
than it was 30 years ago.
352
00:43:05,200 --> 00:43:07,480
It alone is responsible
353
00:43:07,600 --> 00:43:10,960
for a quarter of the rise
in global sea levels.
354
00:43:22,640 --> 00:43:25,640
Changes in the arctic
are already affecting
355
00:43:25,760 --> 00:43:29,360
the lives of its highly
specialised wildlife.
356
00:43:36,320 --> 00:43:37,880
Polar bears.
357
00:43:43,440 --> 00:43:46,880
These one-year-old twins
still rely on their mother
358
00:43:47,000 --> 00:43:52,320
for her milk, protection
and crucial survival lessons.
359
00:44:14,520 --> 00:44:18,720
But they have yet to perfect
their swimming technique...
360
00:44:21,400 --> 00:44:24,960
And they can't wait to practise.
361
00:44:34,520 --> 00:44:37,880
The cubs need to be
as at home in the water
362
00:44:38,000 --> 00:44:39,800
as they are on the sea ice.
363
00:44:51,160 --> 00:44:53,920
Their mother calls them out.
364
00:44:55,480 --> 00:44:56,800
Until they've accumulated
365
00:44:56,920 --> 00:44:59,160
a significant layer
of body fat...
366
00:45:00,240 --> 00:45:02,720
They feel the cold.
367
00:45:04,400 --> 00:45:08,000
A roll in the snow
is a good way to dry off.
368
00:45:13,800 --> 00:45:16,240
Then it's back to play...
369
00:45:19,840 --> 00:45:22,400
While their mother
heads off to hunt.
370
00:45:28,440 --> 00:45:30,080
Over the coming months,
371
00:45:30,200 --> 00:45:35,200
a mother must provide her cubs
with not just milk but meat,
372
00:45:35,320 --> 00:45:37,080
and lots of it.
373
00:45:41,920 --> 00:45:45,760
By midsummer, the sea ice
has become so thin...
374
00:45:51,040 --> 00:45:54,600
That her best chance
of catching her preferred prey
375
00:45:54,720 --> 00:45:59,160
is by ambushing it
from the water.
376
00:46:11,280 --> 00:46:14,200
It's a technique known
as aquatic stalking.
377
00:46:19,360 --> 00:46:21,760
She approaches downwind...
378
00:46:23,520 --> 00:46:29,160
And tries to get within
a metre of a bearded seal.
379
00:46:37,520 --> 00:46:41,280
But today there is less sea ice
to provide cover,
380
00:46:41,400 --> 00:46:46,640
so she is having
to target riskier prey.
381
00:46:49,960 --> 00:46:52,240
The hooded seal.
382
00:47:03,240 --> 00:47:05,760
They are about the same size
as the bearded,
383
00:47:05,880 --> 00:47:09,360
but more aggressive
and dangerous.
384
00:47:45,720 --> 00:47:49,560
She moves round
to the other side.
385
00:48:17,600 --> 00:48:21,520
The arctic is now warming
more than twice as fast
386
00:48:21,640 --> 00:48:23,560
as the rest of the world.
387
00:48:25,120 --> 00:48:27,640
The sea could be ice free
in summer
388
00:48:27,760 --> 00:48:31,680
by as early as 2035.
389
00:48:37,880 --> 00:48:40,520
That will make it harder
for mother polar bears
390
00:48:40,640 --> 00:48:42,320
to feed themselves...
391
00:48:43,520 --> 00:48:45,280
Let alone their cubs.
392
00:48:52,440 --> 00:48:55,040
Well adapted
to live in the cold...
393
00:48:57,320 --> 00:49:00,840
The animals that inhabit
our frozen lands and seas
394
00:49:00,960 --> 00:49:04,160
need one thing
more than any other.
395
00:49:10,520 --> 00:49:15,640
And that is for the planet
to stop warming.
396
00:49:29,600 --> 00:49:33,640
It's now up to us
to make that happen.
397
00:49:52,320 --> 00:49:55,160
Filming across the length
and breadth
398
00:49:55,280 --> 00:49:57,160
of our frozen planet,
399
00:49:57,280 --> 00:49:59,880
one of the team's greatest
challenges was to capture
400
00:50:00,000 --> 00:50:04,080
the enormity of Greenland's
rapidly melting ice sheet.
401
00:50:07,400 --> 00:50:08,920
To do so, the crew launched
402
00:50:09,040 --> 00:50:12,360
five separate
filming expeditions,
403
00:50:12,480 --> 00:50:16,760
installing specially designed
cold-proof time-lapse cameras
404
00:50:16,880 --> 00:50:19,520
that were to run
for three years...
405
00:50:24,640 --> 00:50:27,120
Even commissioning
satellites to record
406
00:50:27,240 --> 00:50:29,720
the big-picture changes.
407
00:50:32,680 --> 00:50:34,760
But the story
would be incomplete
408
00:50:34,880 --> 00:50:37,680
without documenting
the finale of this event -
409
00:50:37,800 --> 00:50:40,840
the calving of
Greenland's store glacier...
410
00:50:42,400 --> 00:50:45,360
A wall of ice
over three miles long...
411
00:50:46,840 --> 00:50:50,120
And towering 120 metres high.
412
00:50:55,680 --> 00:50:58,800
The crew arrive at the height
of the summer thaw,
413
00:50:58,920 --> 00:51:00,400
when, at any moment,
414
00:51:00,520 --> 00:51:04,200
fracturing ice blocks
the size of a small town
415
00:51:04,320 --> 00:51:06,120
may be cast into the sea.
416
00:51:12,000 --> 00:51:14,000
Camping out
for the next three weeks,
417
00:51:14,120 --> 00:51:17,480
the team takes advantage
of the constant daylight
418
00:51:17,600 --> 00:51:20,400
offered by the far north
at this time of the year.
419
00:51:23,920 --> 00:51:26,920
We've got a lot of ice
on the glacier, 24 hours a day.
420
00:51:27,040 --> 00:51:29,240
So, yeah, we're poised.
421
00:51:30,560 --> 00:51:32,760
I started about 8pm
422
00:51:32,880 --> 00:51:34,880
and it's currently, yeah,
just after two.
423
00:51:35,000 --> 00:51:37,840
I've got until 4am
this morning, I think.
424
00:51:42,560 --> 00:51:45,000
They're hoping to be
one of the first film crews
425
00:51:45,120 --> 00:51:47,280
to uso a camera drone
426
00:51:47,400 --> 00:51:50,680
for unprecedented proximity
and a brand-new perspective.
427
00:51:50,800 --> 00:51:52,680
Yeah, it's going.
428
00:51:52,800 --> 00:51:55,880
It's not long before
their new technology
429
00:51:56,000 --> 00:51:58,640
is put to the test.
430
00:52:00,560 --> 00:52:03,680
But it quickly reveals
its limitations.
431
00:52:08,160 --> 00:52:10,920
The issue with the drone,
you've got to turn it on,
432
00:52:11,040 --> 00:52:14,520
get it in the air and fly it
1.5km to the glacier fronts.
433
00:52:15,760 --> 00:52:18,200
So, if you see
a calving happening,
434
00:52:18,320 --> 00:52:20,320
then you're too late.
435
00:52:21,480 --> 00:52:23,600
With a flight time
of just 20 minutes,
436
00:52:23,720 --> 00:52:27,080
gauging the moment of takeoff
is critical.
437
00:52:27,200 --> 00:52:28,440
Helen: Yeah, I feel like today,
438
00:52:28,560 --> 00:52:31,520
just every decision I've made
has been the wrong one.
439
00:52:31,640 --> 00:52:33,720
It's really easy to trick
yourself into thinking,
440
00:52:33,840 --> 00:52:35,200
"oh, it's gonna go,
it's gonna go,"
441
00:52:35,320 --> 00:52:36,320
so you get out there,
442
00:52:36,360 --> 00:52:38,000
use up a whole drone battery
hovenng,
443
00:52:38,120 --> 00:52:41,560
come back, and as you're
heading back - pfff!
444
00:52:43,720 --> 00:52:46,040
Soon, the team face
another problem
445
00:52:46,160 --> 00:52:49,200
that comes with
today's warming arctic.
446
00:52:51,880 --> 00:52:53,400
Unseasonably wet weather
447
00:52:53,520 --> 00:52:56,400
makes it impossible
to fly the drone,
448
00:52:56,520 --> 00:52:59,720
and acts as a catalyst
for further melting.
449
00:53:03,920 --> 00:53:09,080
Absolute racket happening
down in the glacier.
450
00:53:09,200 --> 00:53:10,200
Oh, my goodness.
451
00:53:13,440 --> 00:53:15,400
Even if it is
a major calving event...
452
00:53:18,000 --> 00:53:19,280
Can't see a thing.
453
00:53:23,160 --> 00:53:25,800
That sound just went on and on.
454
00:53:30,360 --> 00:53:32,200
Helen: That one was huge.
455
00:53:35,320 --> 00:53:37,800
After five days of frustration,
456
00:53:37,920 --> 00:53:41,480
the fog finally lifts
to reveal the bay
457
00:53:41,600 --> 00:53:43,760
choked with giant icebergs.
458
00:53:45,920 --> 00:53:49,680
It appears the crew have missed
their opportunity.
459
00:53:56,280 --> 00:53:58,520
The morale of the crew
460
00:53:58,640 --> 00:54:01,240
has taken a little bit
of a downturn.
461
00:54:01,360 --> 00:54:04,480
Do you know what?
I just don't know what to say.
462
00:54:04,600 --> 00:54:06,560
I'm so tired.
463
00:54:06,680 --> 00:54:08,120
To make matters worse,
464
00:54:08,240 --> 00:54:11,120
a plague of mosquitoes descends,
465
00:54:11,240 --> 00:54:13,840
further disheartening
the exhausted team.
466
00:54:20,000 --> 00:54:22,240
Helen: All your senses
are all-go all the time,
467
00:54:22,360 --> 00:54:24,320
even when
you're trying to sleep,
468
00:54:24,440 --> 00:54:25,880
so it's just...
469
00:54:26,000 --> 00:54:28,400
A bit emotionally draining
sometimes.
470
00:54:34,880 --> 00:54:37,640
Then, with just a few
shooting days left,
471
00:54:37,760 --> 00:54:39,720
under a warming sun,
472
00:54:39,840 --> 00:54:44,320
the glacier groans
and rumbles back into action.
473
00:54:48,640 --> 00:54:50,840
Ooh.
474
00:54:52,800 --> 00:54:54,280
Man: Guys, a big one going!
475
00:54:55,320 --> 00:54:58,520
This could be the opportunity
they've been waiting for.
476
00:55:00,320 --> 00:55:03,040
Oh, my gosh, look at that! Ah!
477
00:55:13,520 --> 00:55:15,960
A calving event
lasting long enough
478
00:55:16,080 --> 00:55:17,360
to film from the drone.
479
00:55:20,080 --> 00:55:23,560
But no-one is prepared
for the sheer scale of it.
480
00:55:31,240 --> 00:55:34,960
Just layer after layer of ice
broke away
481
00:55:35,080 --> 00:55:36,160
and fell into the sea,
482
00:55:36,280 --> 00:55:37,680
and then out came
483
00:55:37,800 --> 00:55:40,760
this enormous,
skyscraper-sized iceberg,
484
00:55:40,880 --> 00:55:44,160
displacing vast quantities
of water
485
00:55:44,280 --> 00:55:46,680
and throwing enormous blocks
of ice around
486
00:55:46,800 --> 00:55:48,080
like they were nothing.
487
00:55:50,360 --> 00:55:53,120
Sitting here, day after day,
crossing your fingers
488
00:55:53,240 --> 00:55:54,760
and hoping that you get
a big calving
489
00:55:54,880 --> 00:55:56,616
and you see a big event,
and you manage to film it,
490
00:55:56,640 --> 00:55:58,840
and when it does happen
and when it does go off,
491
00:55:58,960 --> 00:56:01,080
it's so exciting,
and you get the adrenaline.
492
00:56:01,200 --> 00:56:03,280
And then aftennards,
as you're sort of coming down
493
00:56:03,400 --> 00:56:05,120
from that, there is
a bitter sweetness to it
494
00:56:05,200 --> 00:56:06,920
as she realised
that's another piece of ice
495
00:56:07,040 --> 00:56:09,560
that's slowly raising
the sea level.
496
00:56:13,200 --> 00:56:17,080
Such imagery provides
an invaluable record
497
00:56:17,200 --> 00:56:18,720
of the rapid changes
498
00:56:18,840 --> 00:56:20,360
that are now taking place
499
00:56:20,480 --> 00:56:23,240
across our frozen planet.
35525
Can't find what you're looking for?
Get subtitles in any language from opensubtitles.com, and translate them here.