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The Islands of Svalbard in Arctic Norway. | 0:00:44 | 0:00:49 | |
They might be remote, but they're under surveillance. | 0:00:49 | 0:00:53 | |
WHIRRING | 0:00:55 | 0:00:57 | |
Spy cameras are capturing | 0:01:02 | 0:01:04 | |
the most intimate images ever taken of polar bears. | 0:01:04 | 0:01:08 | |
They're revealing some remarkable behaviour, and discovering an animal | 0:01:08 | 0:01:13 | |
of surprising curiosity and intelligence. | 0:01:13 | 0:01:17 | |
Snowcam doesn't operate alone. | 0:01:25 | 0:01:28 | |
Blizzardcam can travel at 40 mph, | 0:01:33 | 0:01:36 | |
powered by propellers and gliding on skis. | 0:01:36 | 0:01:40 | |
Snowballcam can operate at temperatures of 40 below. | 0:01:43 | 0:01:46 | |
Its spherical design makes it almost indestructible. | 0:01:46 | 0:01:50 | |
Together they explore the islands, looking for bears. | 0:01:55 | 0:02:00 | |
Their first mission is to film a mother with cubs | 0:02:02 | 0:02:05 | |
emerging from maternity dens hidden in these hills. | 0:02:05 | 0:02:08 | |
The only clue to the den's presence is a snowy mound. | 0:02:08 | 0:02:14 | |
Driftcam and other spycams can lay in wait for days. | 0:02:14 | 0:02:18 | |
They're left unattended, primed to film the moment they sense movement. | 0:02:24 | 0:02:28 | |
A whiteout soon makes their task seem like mission impossible. | 0:02:31 | 0:02:35 | |
But help is a paw swipe away. | 0:02:41 | 0:02:44 | |
The cub's first steps outside the den... | 0:03:08 | 0:03:11 | |
filmed by his mother. | 0:03:11 | 0:03:13 | |
She pushes the camera down the slope. | 0:03:38 | 0:03:42 | |
A tracking shot! | 0:03:42 | 0:03:43 | |
As she films, there is no human presence of any kind. | 0:03:50 | 0:03:54 | |
She even adjusts the camera to record her own exit. | 0:04:08 | 0:04:11 | |
She must get her cub to the sea-ice before it breaks up and thaws, | 0:04:32 | 0:04:36 | |
otherwise they'll be trapped on the island for the summer, | 0:04:36 | 0:04:39 | |
with little to eat. | 0:04:39 | 0:04:41 | |
She needs to be careful. | 0:04:45 | 0:04:48 | |
Males roam the ice-fields below, | 0:04:49 | 0:04:52 | |
and they kill cubs. | 0:04:52 | 0:04:54 | |
They will try to mate with the mother so she has their cubs instead. | 0:04:59 | 0:05:05 | |
But the larger males find deep snow and steep slopes heavy-going. | 0:05:08 | 0:05:12 | |
She wisely keeps her cub to the higher ground. | 0:05:12 | 0:05:15 | |
Back at the den-sites, other cubs are yet to emerge. | 0:05:25 | 0:05:28 | |
They appear over a five-week period from March to April. | 0:05:32 | 0:05:36 | |
After ten days of waiting, something stirs. | 0:05:36 | 0:05:40 | |
The mother has waited six whole months for this moment. | 0:05:50 | 0:05:54 | |
She blinks in the sunlight. | 0:06:00 | 0:06:02 | |
She spent her confinement in semi-darkness. | 0:06:02 | 0:06:04 | |
She checks that the coast is clear, and then reveals her secrets. | 0:06:11 | 0:06:16 | |
Time for a stretch. | 0:06:31 | 0:06:32 | |
She's been cooped up with her cubs since she gave birth three months ago. | 0:06:32 | 0:06:37 | |
They learn by example, | 0:06:52 | 0:06:53 | |
but their first lesson seems to be about snowballs. | 0:06:53 | 0:06:56 | |
When she leaves, she expects them to follow. | 0:07:14 | 0:07:18 | |
But the first steps are always the most difficult to take. | 0:07:24 | 0:07:28 | |
He will soon learn that to survive they must stick together. | 0:07:32 | 0:07:36 | |
A frozen sea now surrounds the islands. | 0:07:50 | 0:07:52 | |
It stretches all the way to the North Pole. | 0:07:52 | 0:07:55 | |
It is out on this ice that most polar bears spend their lives. | 0:07:55 | 0:07:59 | |
But in spring males return to land to search for females. | 0:08:07 | 0:08:11 | |
Males may be a risk to cubs, but this one is otherwise engaged. | 0:08:19 | 0:08:23 | |
He's found a lone female. | 0:08:23 | 0:08:26 | |
But polar bear courtship is never straightforward. | 0:08:34 | 0:08:38 | |
She likes to play hard to get. | 0:08:38 | 0:08:40 | |
It's also a challenge for blizzardcam. | 0:08:42 | 0:08:45 | |
She's testing his fitness, making sure he's a good catch. | 0:09:02 | 0:09:05 | |
His skills on the slopes show room for improvement. | 0:09:13 | 0:09:16 | |
And now the female invents a new challenge - a climbing contest. | 0:09:30 | 0:09:35 | |
Her huge claws act like crampons. | 0:09:38 | 0:09:41 | |
Being lighter and nimbler, she has the advantage. | 0:09:41 | 0:09:45 | |
Males can be twice as heavy, reaching three quarters of a ton. | 0:09:47 | 0:09:51 | |
HE GROANS | 0:09:55 | 0:09:58 | |
She's after a mate that's playful and energetic, | 0:09:58 | 0:10:05 | |
one with strong genes. | 0:10:05 | 0:10:08 | |
But his chances are slipping away. | 0:10:10 | 0:10:14 | |
She tested his performance and pushed him too far. | 0:10:15 | 0:10:19 | |
Meanwhile, the mother with one cub is still sticking to higher ground. | 0:10:28 | 0:10:32 | |
But deep snow is a real struggle for her little cub. | 0:10:37 | 0:10:40 | |
SHE CALLS | 0:10:52 | 0:10:55 | |
She encourages him with reassuring calls. | 0:10:59 | 0:11:02 | |
She's aware of his difficulties and uses her body as a shield. | 0:11:21 | 0:11:24 | |
She must stay attentive | 0:11:29 | 0:11:30 | |
if her cub is to survive in this harsh Arctic world. | 0:11:30 | 0:11:34 | |
Realising he's exhausted, she digs a hollow to rest in. | 0:11:41 | 0:11:45 | |
In day-dens like this she suckles him six times a day. | 0:11:45 | 0:11:49 | |
Meanwhile, the courting male is yet to prove he's up for the job. | 0:12:02 | 0:12:07 | |
But the female doesn't like being ignored. | 0:12:09 | 0:12:12 | |
She tries to reignite his passion. | 0:12:15 | 0:12:18 | |
Time to turn up the heat. | 0:12:31 | 0:12:33 | |
He's certainly interested now. | 0:12:59 | 0:13:01 | |
She's falling head over heels for him. | 0:13:06 | 0:13:08 | |
He's now totally captivated. | 0:13:22 | 0:13:24 | |
But still she gives him the runaround. | 0:13:27 | 0:13:30 | |
But in courtship there are always casualties. | 0:13:36 | 0:13:40 | |
Blizzardcam is at the bear's mercy. | 0:13:45 | 0:13:48 | |
But again a bear helps with the filming. | 0:13:56 | 0:14:00 | |
Sealed with a kiss, | 0:14:05 | 0:14:06 | |
the couple's whirlwind romance will last three weeks. | 0:14:06 | 0:14:10 | |
Out on the frozen sea, a young male has killed a seal. | 0:14:20 | 0:14:24 | |
He caught it when it surfaced through a breathing hole in the ice. | 0:14:29 | 0:14:34 | |
To film from a different angle, blizzardcam deploys snowballcam. | 0:14:34 | 0:14:39 | |
This technical miracle rolls with no visible moving parts. | 0:14:44 | 0:14:49 | |
Its lens even boasts a self-righting mechanism. | 0:14:49 | 0:14:52 | |
A close-up reveals that he's eating the blubber. | 0:14:59 | 0:15:02 | |
This provides the most nutrition and is always eaten first. | 0:15:02 | 0:15:06 | |
Seals make up 95% of a polar bear's diet | 0:15:11 | 0:15:14 | |
and are only found near the sea-ice. | 0:15:14 | 0:15:17 | |
The two-cub family are attracted to the frozen sea to hunt seals as well. | 0:15:21 | 0:15:27 | |
She hunts the pups of ringed seals that hide in snowy dens on the ice. | 0:15:29 | 0:15:34 | |
She finds them by smell, even a metre down. | 0:15:36 | 0:15:40 | |
She pile-drives the snow with a force of two tons, | 0:15:41 | 0:15:46 | |
but the roof of the den holds. | 0:15:46 | 0:15:48 | |
Back at the carcass, | 0:15:58 | 0:16:00 | |
the spycams stay on to film bears attracted to the leftovers. | 0:16:00 | 0:16:04 | |
The mother and single cub. | 0:16:09 | 0:16:11 | |
She could smell the remains from 20 miles away. | 0:16:11 | 0:16:14 | |
In the den, she spent six months without eating | 0:16:18 | 0:16:21 | |
while the males fattened up on seals. | 0:16:21 | 0:16:23 | |
She leaves little behind. | 0:16:31 | 0:16:33 | |
Males are still on the lookout for females. | 0:16:39 | 0:16:42 | |
For her cub's safety, she heads back to the hills. | 0:16:47 | 0:16:51 | |
But, as spring continues, | 0:16:56 | 0:16:59 | |
lengthening days bring sudden and dramatic change. | 0:16:59 | 0:17:02 | |
The highest tides of the year combine with rising temperatures | 0:17:03 | 0:17:07 | |
to trigger a vast breakup of the ice that surrounds the islands. | 0:17:07 | 0:17:11 | |
In just one night it can crack apart and drift 20 miles or more. | 0:17:16 | 0:17:21 | |
Svalbard is a series of islands once more. | 0:17:45 | 0:17:48 | |
The mother and single cub are still on the snowy hills, | 0:17:56 | 0:18:00 | |
but signs of change are all around. | 0:18:00 | 0:18:03 | |
At the shoreline, things are not as expected. | 0:18:17 | 0:18:20 | |
The sea-ice has drifted northwards | 0:18:28 | 0:18:30 | |
and, with it, the bears' food supply. | 0:18:30 | 0:18:34 | |
It's a huge swim for an adult bear. | 0:18:34 | 0:18:37 | |
For the cub, it's out of the question. | 0:18:37 | 0:18:41 | |
Their ship has sailed and left them behind. | 0:18:43 | 0:18:47 | |
They are marooned on the island for the summer. | 0:18:47 | 0:18:50 | |
The two-cub family managed to board the sea ice | 0:18:56 | 0:18:59 | |
before it drifted too far. | 0:18:59 | 0:19:01 | |
This new and ever-changing world requires a different spy camera. | 0:19:01 | 0:19:07 | |
Icebergcam. | 0:19:07 | 0:19:09 | |
It effortlessly steers between ice sheets | 0:19:11 | 0:19:14 | |
and its turret rotates to follows the bears. | 0:19:14 | 0:19:17 | |
The bears' lives are now governed by the state of the drifting ice | 0:19:40 | 0:19:43 | |
and the movement of the seals. | 0:19:43 | 0:19:46 | |
The cubs are expected to keep up but their mother knows their limits, | 0:19:55 | 0:19:59 | |
avoiding long, hazardous swims. | 0:19:59 | 0:20:02 | |
But all the while she keeps them on the move, | 0:20:40 | 0:20:43 | |
tracking the seals that gather around the leading edge of ice. | 0:20:43 | 0:20:46 | |
Back on land, icebergcam follows the one-cub family. | 0:20:52 | 0:20:56 | |
With the seals gone, beachcombing is her best option to find food. | 0:21:00 | 0:21:04 | |
He practises his climbing skills... | 0:21:07 | 0:21:09 | |
..but it's early days. | 0:21:10 | 0:21:12 | |
She has found something just below the surface. | 0:21:14 | 0:21:17 | |
She checks how deep she has to dive, | 0:21:29 | 0:21:32 | |
then takes the plunge. | 0:21:32 | 0:21:35 | |
It's seaweed. | 0:21:42 | 0:21:45 | |
Kelp is not wildly exciting, | 0:21:46 | 0:21:48 | |
but it does contain carbohydrates and some protein too. | 0:21:48 | 0:21:52 | |
The cub must find her acrobatics rather strange. | 0:22:00 | 0:22:04 | |
Hungry bears eat virtually anything. | 0:22:25 | 0:22:28 | |
It's a question of making the most of what's around. | 0:22:28 | 0:22:31 | |
And it's never too soon to start hunting. | 0:22:31 | 0:22:35 | |
Polar bears investigate every unfamiliar sight and smell. | 0:22:55 | 0:23:00 | |
They are the most curious subjects ever filmed by spycams. | 0:23:00 | 0:23:04 | |
This fascination suggests a surprising intelligence, | 0:23:13 | 0:23:17 | |
one that evolved for the extraordinary challenges | 0:23:17 | 0:23:21 | |
of hunting on ice. | 0:23:21 | 0:23:22 | |
Ice floes present real difficulties for a predator, | 0:23:29 | 0:23:32 | |
continually changing their shape and form. | 0:23:32 | 0:23:35 | |
Seals are also tricky prey. | 0:23:40 | 0:23:42 | |
In open water they are just too agile to catch. | 0:23:42 | 0:23:46 | |
It becomes a little easier when they haul out on ice. | 0:23:53 | 0:23:57 | |
But they hug the water's edge for a quick escape. | 0:24:00 | 0:24:04 | |
The bear immediately has a problem. | 0:24:13 | 0:24:15 | |
There is no cover between him and his prey. | 0:24:15 | 0:24:18 | |
He wrong-foots the seal by seemingly walking away. | 0:24:21 | 0:24:26 | |
Every hunt presents a different challenge, | 0:24:26 | 0:24:30 | |
so he plans a new strategy each time. | 0:24:30 | 0:24:33 | |
He slinks into the water, | 0:24:33 | 0:24:34 | |
using a channel between the ice floes to act as cover. | 0:24:34 | 0:24:38 | |
He swims, hardly making a sound, | 0:24:52 | 0:24:55 | |
reaching six miles per hour at times. | 0:24:55 | 0:24:59 | |
His front legs provide propulsion, while his back legs steer. | 0:25:00 | 0:25:04 | |
His low profile makes him seem like a floating sliver of ice. | 0:25:13 | 0:25:18 | |
He checks the seal's position and takes wind direction into account to work out his final approach. | 0:25:26 | 0:25:32 | |
As he closes in he makes a clever move, | 0:25:37 | 0:25:39 | |
diving deep beneath the ice floe. | 0:25:39 | 0:25:42 | |
He emerges on the blind side of the seal. | 0:25:50 | 0:25:53 | |
So far, so good. | 0:26:07 | 0:26:10 | |
He can hold his breath for minutes, | 0:26:19 | 0:26:22 | |
and calculate the seal's exact position. | 0:26:22 | 0:26:25 | |
Slo-mo reveals just how close he got. | 0:26:35 | 0:26:38 | |
His skills show a remarkable intelligence at work. | 0:26:47 | 0:26:50 | |
He hunted in all three dimensions, | 0:26:52 | 0:26:55 | |
making full use of the opportunities offered by water and ice. | 0:26:55 | 0:26:59 | |
Back on Svalbard, it's high summer. | 0:27:04 | 0:27:06 | |
Barnacle geese that had overwintered in Scotland have started to breed. | 0:27:06 | 0:27:11 | |
Their calls bring hope to hungry bears. | 0:27:11 | 0:27:15 | |
The cub stays back as his mother explores the possibilities. | 0:27:23 | 0:27:28 | |
Bears have only recently discovered this new source of food, | 0:27:32 | 0:27:35 | |
seeking out colonies that nest on the ground rather than on cliffs. | 0:27:35 | 0:27:40 | |
The eggs are a rich source of protein. | 0:27:40 | 0:27:44 | |
Just 250 are as nutritious as one ringed seal. | 0:27:44 | 0:27:48 | |
She carefully picks up an egg in her jaws before swallowing its contents. | 0:27:49 | 0:27:54 | |
The geese launch an attack. | 0:27:56 | 0:28:00 | |
Some have goslings, a bite-size snack for a bear. | 0:28:04 | 0:28:08 | |
In just one day, one bear can devour over 1,000 eggs and hatchlings, | 0:28:13 | 0:28:18 | |
destroying a whole colony. | 0:28:18 | 0:28:21 | |
But, as the threat escalates, so does the defence. | 0:28:22 | 0:28:25 | |
Arctic skuas join the attack. | 0:28:33 | 0:28:35 | |
A skua lands a direct hit. | 0:28:40 | 0:28:43 | |
She's had enough. | 0:28:43 | 0:28:44 | |
In future, the birds will have to start nesting on cliffs | 0:28:47 | 0:28:50 | |
to avoid polar bear attacks. | 0:28:50 | 0:28:51 | |
Skuas may have saved the colony this time | 0:28:54 | 0:28:57 | |
but they've made the bears' lives a lot more difficult. | 0:28:57 | 0:29:00 | |
Further north on Svalbard, | 0:29:04 | 0:29:06 | |
other landlocked bears have found a more reliable meal, | 0:29:06 | 0:29:10 | |
a carcass of a stranded fin whale. | 0:29:10 | 0:29:14 | |
Icebergcam investigates the happy gathering. | 0:29:15 | 0:29:19 | |
The whale is 24 metres long and weighs 60 tons, | 0:29:20 | 0:29:24 | |
a once-in-a-lifetime feeding opportunity. | 0:29:24 | 0:29:28 | |
An adolescent eats confidently alongside four adult bears. | 0:29:34 | 0:29:38 | |
They continually chatter away to each other. | 0:29:44 | 0:29:46 | |
It's all about keeping aggression under control. | 0:29:46 | 0:29:49 | |
ROARING | 0:29:49 | 0:29:51 | |
Their massive claws rake the skin like knives, cutting it into strips. | 0:30:01 | 0:30:06 | |
At two years old, this bear is testing his status, | 0:30:08 | 0:30:12 | |
standing up to other bears. | 0:30:12 | 0:30:14 | |
Sharing food helps everyone survive | 0:30:20 | 0:30:22 | |
in an environment where prey is usually hard to come by. | 0:30:22 | 0:30:25 | |
As summer progresses, the temperature creeps above freezing | 0:30:29 | 0:30:33 | |
and the larger ice sheets fragment into ever smaller plates. | 0:30:33 | 0:30:38 | |
To avoid being trapped on shrinking ice floes, | 0:30:39 | 0:30:43 | |
the cubs must get used to an endless polar assault course. | 0:30:43 | 0:30:47 | |
Rolling is clearly fun, but it also has a purpose. | 0:31:20 | 0:31:24 | |
It squeezes out water trapped in the fur. | 0:31:24 | 0:31:27 | |
Her cubs are growing fast and are full of energy. | 0:31:37 | 0:31:41 | |
But to keep them fit she must keep them fed. | 0:31:41 | 0:31:44 | |
A male has killed a bearded seal. | 0:31:46 | 0:31:49 | |
For the sake of her cubs, she needs to be cautious. | 0:32:03 | 0:32:07 | |
Burying the carcass will help reduce its odour, | 0:32:12 | 0:32:15 | |
concealing it from other bears. | 0:32:15 | 0:32:18 | |
If it hasn't already been seen, that is. | 0:32:25 | 0:32:28 | |
The bears at the whale carcass are in food heaven, | 0:32:36 | 0:32:39 | |
but their peace is about to be shattered. | 0:32:39 | 0:32:42 | |
This male heavyweight prefers to eat alone. | 0:32:46 | 0:32:50 | |
He is bigger than the other bears | 0:32:51 | 0:32:54 | |
and likes to throw his weight around. | 0:32:54 | 0:32:57 | |
This is no time for heroics. | 0:32:58 | 0:33:00 | |
The mother tries to guide her offspring away. | 0:33:14 | 0:33:17 | |
But the young bear is an easy target. | 0:33:20 | 0:33:23 | |
The male could kill with just one bite. | 0:33:43 | 0:33:46 | |
The youngster daren't turn his back. | 0:33:53 | 0:33:56 | |
But, despite the male's persistence, | 0:34:21 | 0:34:24 | |
he seems to be just teaching the young upstart a lesson. | 0:34:24 | 0:34:27 | |
Reunited with his mother, she appears to scold him. | 0:34:28 | 0:34:32 | |
SHE BARKS | 0:34:32 | 0:34:34 | |
Authority established, the male is now king of the carcass. | 0:34:37 | 0:34:42 | |
Back at the kill site, the family finally steal a meal. | 0:34:45 | 0:34:49 | |
This is a high-risk strategy. | 0:34:59 | 0:35:02 | |
Like the male at the whale carcass, some bears don't do sharing. | 0:35:07 | 0:35:12 | |
She stands up to make herself look bigger. | 0:35:18 | 0:35:21 | |
The cub copies. | 0:35:21 | 0:35:23 | |
Luckily this bear has no appetite for a fight. | 0:35:33 | 0:35:38 | |
There is a feeding etiquette around a seal carcass. | 0:35:59 | 0:36:02 | |
Bears that approach correctly are often allowed to share, | 0:36:02 | 0:36:06 | |
particularly if they are known. | 0:36:06 | 0:36:08 | |
They greet. | 0:36:11 | 0:36:12 | |
Away from the carcass, | 0:36:12 | 0:36:14 | |
young males often become friends, hanging out together. | 0:36:14 | 0:36:19 | |
As ever, our spycams prove a huge hit with the curious bears. | 0:36:23 | 0:36:28 | |
With the driftcams out of action, | 0:36:40 | 0:36:42 | |
blizzardcam returns to frontline duties. | 0:36:42 | 0:36:44 | |
And deploys back-up. | 0:36:51 | 0:36:53 | |
Snowballcam's arrival fascinates the curious bears, | 0:36:58 | 0:37:02 | |
particularly as the steep slope gives it momentum. | 0:37:02 | 0:37:06 | |
He tries some fancy footwork. | 0:37:21 | 0:37:24 | |
More bears join the team. | 0:37:25 | 0:37:27 | |
Time for kick-off. | 0:37:36 | 0:37:37 | |
It's polar bear football. | 0:37:45 | 0:37:48 | |
Their ball control needs practice | 0:37:58 | 0:38:01 | |
but they are experts at dribbling. | 0:38:01 | 0:38:03 | |
The game descends into argument. | 0:38:06 | 0:38:09 | |
The spycams return to the benches. | 0:38:18 | 0:38:20 | |
The bears might be play-fighting, but things still get out of hand. | 0:38:20 | 0:38:23 | |
Meanwhile, on Svalbard, a kittiwake colony brings hope | 0:38:26 | 0:38:30 | |
to the hungry mother and cub. | 0:38:30 | 0:38:32 | |
They can't reach the nests but there is still food to be had. | 0:38:37 | 0:38:41 | |
Grass is the bears' emergency rations | 0:38:47 | 0:38:50 | |
and it flourishes wherever bird droppings provide fertiliser. | 0:38:50 | 0:38:54 | |
It provides little real nourishment but it helps stop hunger pangs. | 0:39:04 | 0:39:09 | |
But, to survive, the bears will need protein. | 0:39:09 | 0:39:12 | |
In comparison, the ice bears have it easy, | 0:39:16 | 0:39:19 | |
but the rising summer temperatures can cramp a hunter's style. | 0:39:19 | 0:39:23 | |
He's tracking bearded seals, | 0:39:31 | 0:39:34 | |
an ambitious quarry. | 0:39:34 | 0:39:36 | |
She has battle scars from a previous bear encounter. | 0:39:39 | 0:39:43 | |
It won't be easy. | 0:39:43 | 0:39:45 | |
The bear has two to choose from. The odds are good. | 0:39:45 | 0:39:50 | |
But he's treading on thin ice. | 0:39:52 | 0:39:55 | |
He spreads his legs to distribute his weight and progresses carefully. | 0:40:00 | 0:40:05 | |
But it's not enough. | 0:40:14 | 0:40:17 | |
For a hunting bear it doesn't get much worse than this. | 0:40:21 | 0:40:25 | |
The seal could hardly fail to notice. | 0:40:28 | 0:40:31 | |
But this battle-hardened seal is in no rush. | 0:40:34 | 0:40:37 | |
Finally he gains some purchase. He's back in the game. | 0:40:50 | 0:40:54 | |
He still believes he's in with a chance. | 0:41:01 | 0:41:04 | |
He can charge at 25 miles per hour. | 0:41:10 | 0:41:13 | |
But bears usually wait until they're 30 metres away. | 0:41:17 | 0:41:21 | |
This one started at 300. | 0:41:21 | 0:41:23 | |
She has all the time in the world to escape. | 0:41:29 | 0:41:31 | |
Only the bears unexpected dunking in the ice | 0:41:34 | 0:41:37 | |
could explain such an amateur performance. | 0:41:37 | 0:41:40 | |
The ice is now so thin, it only supports the weight of the lighter cubs, | 0:41:47 | 0:41:52 | |
leaving the mother struggling. | 0:41:52 | 0:41:54 | |
This is a sign that the mother must head north | 0:42:08 | 0:42:11 | |
to the more permanent icecap as quickly as possible. | 0:42:11 | 0:42:14 | |
But a combination of wind and current destroys her best-laid plan. | 0:42:17 | 0:42:23 | |
A sudden swell turns ice into open ocean. | 0:42:25 | 0:42:29 | |
The cubs are too young to swim long distances safely. | 0:42:43 | 0:42:46 | |
But going back is not an option. | 0:42:56 | 0:42:59 | |
The cubs' only hope is to keep up. | 0:43:04 | 0:43:07 | |
They paddle for their lives, staying as close to Mum as possible. | 0:43:07 | 0:43:11 | |
She can swim 50 miles or more, but the cubs will soon be struggling. | 0:43:15 | 0:43:20 | |
On the island, months of having to make do are taking their toll. | 0:43:26 | 0:43:30 | |
The cub is half the size of those on the ice. | 0:43:30 | 0:43:33 | |
A colony of walrus blocks their path. | 0:43:38 | 0:43:42 | |
Just one would make a substantial meal. | 0:43:42 | 0:43:44 | |
But walrus can weigh a ton and a half | 0:43:48 | 0:43:52 | |
and their tusks can reach a metre in length, | 0:43:52 | 0:43:55 | |
hardly a pushover. | 0:43:55 | 0:43:56 | |
Her only hope is to find one that is weak or injured. | 0:44:02 | 0:44:05 | |
She assesses the colony. | 0:44:14 | 0:44:16 | |
With a cub to provide for, she can't take risks. | 0:44:18 | 0:44:21 | |
She provokes the walrus to test their reactions. | 0:44:26 | 0:44:29 | |
SHE GROWLS | 0:44:29 | 0:44:30 | |
GRUMBLING | 0:44:30 | 0:44:32 | |
All are healthy. She won't take the gamble. | 0:44:37 | 0:44:41 | |
But all is not lost. | 0:44:49 | 0:44:52 | |
She has caught a new scent. | 0:44:52 | 0:44:54 | |
The cubs are in trouble. | 0:45:07 | 0:45:09 | |
They are exhausted. | 0:45:13 | 0:45:15 | |
The male cub rests his head on his sister. | 0:45:15 | 0:45:19 | |
They crowd into the mother's slipstream, trying to gain any advantage. | 0:45:24 | 0:45:28 | |
At last there is hope. | 0:45:43 | 0:45:47 | |
They have finally reached the pack ice that forms the polar icecap. | 0:46:07 | 0:46:12 | |
It's the ultimate hunting habitat for polar bears. | 0:46:12 | 0:46:16 | |
The icecap stretches all the way to the North Pole. | 0:46:16 | 0:46:19 | |
Seals are found wherever it meets the sea. | 0:46:19 | 0:46:22 | |
It's been a long journey. | 0:46:33 | 0:46:35 | |
They are 100 miles from Svalbard | 0:46:35 | 0:46:38 | |
and 150 miles from the den-sites where they were born. | 0:46:38 | 0:46:41 | |
For now she can relax, having fulfilled her mission. | 0:46:49 | 0:46:53 | |
It's the perfect spot to spend the few months left of summer. | 0:46:53 | 0:46:56 | |
It is four months since Svalbard was surrounded by sea-ice. | 0:47:03 | 0:47:07 | |
It could be another two before it freezes again. | 0:47:07 | 0:47:11 | |
Guided by her sense of smell, | 0:47:11 | 0:47:13 | |
the mother discovers what's left of the stranded whale. | 0:47:13 | 0:47:17 | |
But it looks like the remains have been stripped clean by bears. | 0:47:18 | 0:47:21 | |
The massive backbone says it all. | 0:47:24 | 0:47:26 | |
There's not a scrap to be found. | 0:47:26 | 0:47:29 | |
This was their last hope. | 0:47:42 | 0:47:44 | |
With the carcass gone, the bears search the shore for scraps. | 0:47:51 | 0:47:56 | |
All that remains are sun-bleached bones. | 0:47:56 | 0:47:59 | |
There is little nutrition here, | 0:48:03 | 0:48:05 | |
but at least the cub has found something to chew on. | 0:48:05 | 0:48:08 | |
Calcium from the bones will help the mother's milk supply | 0:48:12 | 0:48:17 | |
but the cub needs meat to survive. | 0:48:17 | 0:48:19 | |
Now they have another problem. | 0:48:25 | 0:48:28 | |
Other bears can't be trusted with small cubs. | 0:48:32 | 0:48:36 | |
But fortunately they seem more interested in what lies beneath the surface. | 0:48:43 | 0:48:48 | |
It looks like there is still meat to be found here, | 0:48:59 | 0:49:02 | |
partially preserved by the cold water. | 0:49:02 | 0:49:05 | |
Despite her hunger, the mother can't risk joining in. | 0:49:17 | 0:49:21 | |
But the other bears don't stay long. | 0:49:25 | 0:49:28 | |
The mother grasps her opportunity. | 0:49:32 | 0:49:35 | |
Her cub's survival depends on her success. | 0:49:35 | 0:49:38 | |
The remains lie four metres down. | 0:49:50 | 0:49:53 | |
And, at the deepest point, flesh still clings to the backbone. | 0:49:58 | 0:50:02 | |
She emerges triumphant. | 0:50:07 | 0:50:10 | |
The meat must be rancid, but it's still a lifesaver. | 0:50:19 | 0:50:23 | |
She brings some back to the shore. | 0:50:37 | 0:50:39 | |
This is the moment the cub has been waiting for, but still he has to wait. | 0:50:46 | 0:50:51 | |
However unfair it seems, | 0:50:51 | 0:50:52 | |
she must regain her strength or her cub won't survive anyway. | 0:50:52 | 0:50:56 | |
Finally, she leaves him some scraps to chew on. | 0:51:05 | 0:51:08 | |
A young male arrives, a dangerous situation for the cub. | 0:51:15 | 0:51:19 | |
She growls a warning, but it's not enough. | 0:51:28 | 0:51:32 | |
The cub slips. | 0:51:41 | 0:51:43 | |
The mother must get her cub away from danger as quickly as possible. | 0:52:00 | 0:52:04 | |
They head north. | 0:52:08 | 0:52:10 | |
She knows that this is where the ice, and with it the seals, will first return. | 0:52:10 | 0:52:15 | |
It's now September, but the sea might not freeze again for another two months. | 0:52:20 | 0:52:26 | |
Her cub is unlikely to survive that long. | 0:52:26 | 0:52:30 | |
But there is hope on the horizon. | 0:52:35 | 0:52:38 | |
An ice-rainbow heralds change. | 0:52:45 | 0:52:48 | |
In the far north, temperatures drop at last | 0:52:56 | 0:52:59 | |
and ice sheets start to grow rather than disappear. | 0:52:59 | 0:53:02 | |
Then a miracle happens. | 0:53:10 | 0:53:12 | |
Building pressure combines with powerful southerly currents | 0:53:12 | 0:53:16 | |
to push the drift-ice southwards. | 0:53:16 | 0:53:19 | |
The mother and cub are thrown a lifeline | 0:53:37 | 0:53:40 | |
by a change in the weather and ocean currents. | 0:53:40 | 0:53:43 | |
It's a huge swim out to the ice floes for the little cub. | 0:53:47 | 0:53:51 | |
He finally makes it to the ice, | 0:54:09 | 0:54:12 | |
nine months after he was born. | 0:54:12 | 0:54:14 | |
His mother has triumphed against the odds to reach this land of plenty. | 0:54:16 | 0:54:21 | |
On the way, she taught her cub the survival skills | 0:54:23 | 0:54:27 | |
for what could be an increasingly ice-free future. | 0:54:27 | 0:54:30 | |
More than anything, | 0:54:40 | 0:54:42 | |
the cub learnt that curiosity is the key to survival. | 0:54:42 | 0:54:45 | |
But there is one more challenge ahead. | 0:54:46 | 0:54:48 | |
A young male has caught a seal. | 0:54:52 | 0:54:54 | |
They can't walk away from the chance of fresh meat. | 0:55:04 | 0:55:08 | |
He charges, but she refuses to be intimidated. | 0:55:08 | 0:55:12 | |
She needs a meal far more than he does. | 0:55:12 | 0:55:15 | |
She drives home her determination. | 0:55:17 | 0:55:19 | |
Well-fed bears eat only the blubber, leaving the rest for others. | 0:55:28 | 0:55:32 | |
They waited the whole summer for this moment. | 0:55:35 | 0:55:37 | |
Their first taste of fresh meat for four months. | 0:55:37 | 0:55:41 | |
They are safe from starvation. | 0:55:41 | 0:55:44 | |
Of all the subjects ever filmed by spycams, | 0:55:59 | 0:56:02 | |
the polar bear has shown the greatest curiosity and intelligence. | 0:56:02 | 0:56:06 | |
And none more so than this mother. | 0:56:06 | 0:56:09 | |
Against the odds, she brought her cub up | 0:56:10 | 0:56:12 | |
in one of the longest periods without ice in Svalbard's history. | 0:56:12 | 0:56:17 | |
The cub faced many challenges over the summer, but to reveal his story | 0:56:17 | 0:56:22 | |
the spy cameras faced challenges of their own. | 0:56:22 | 0:56:25 | |
Snowcam met its demise under the paws of a bored young male. | 0:56:27 | 0:56:32 | |
Blizzardcam nearly met its match | 0:56:44 | 0:56:46 | |
with the most playful bear it ever encountered. | 0:56:46 | 0:56:49 | |
The bear wanted to know how it worked. | 0:56:52 | 0:56:55 | |
Blizzardcam deployed snowballcam as a decoy. | 0:57:00 | 0:57:04 | |
This was the polar bears' favourite spy camera | 0:57:06 | 0:57:10 | |
and this young male was no exception. | 0:57:10 | 0:57:13 | |
Never before had it come under so much pressure. | 0:57:13 | 0:57:17 | |
Valiantly, snowballcam kept filming until the very end. | 0:57:29 | 0:57:33 | |
Fortunately, for most of the time, | 0:57:37 | 0:57:40 | |
the spycams were ignored, capturing intimate moments like this. | 0:57:40 | 0:57:45 | |
But icebergcam finally found itself trapped between ice floes. | 0:57:45 | 0:57:49 | |
As ever, the mother's curiosity is piqued. | 0:57:57 | 0:58:01 | |
The curiosity that helped the mother and cub survive | 0:58:05 | 0:58:10 | |
is now testing icebergcam to destruction. | 0:58:10 | 0:58:13 | |
This same curiosity is this cub's, and all polar bears', best hope for the future. | 0:58:14 | 0:58:21 | |
Subtitles by Red Bee Media Ltd | 0:58:52 | 0:58:54 | |
E-mail [email protected] | 0:58:54 | 0:58:56 |