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As it gains speed, huge crevass open that extend down to its very core.
The crystalline surface of the ice stalactite
This meltwater has a surprising effect.
The ice floe is breaking up.
-through a plastic tube in his nostril. - Yeah, that's fine.
to reach the great swarms of krill and herring below.
was the extreme remoteness of their locations.
For this reason, snow is the lifeblood of these silent forests,
They are places of superlative,
the largest expanse of ice on the planet.
With him is cameraman Gavin Thurston.
First, a hand chisel to create an opening,
This sculptured spire is a remnant of a mountain,
a ploy to trigger a stampede and split away one of the smaller ones.
And orca come right by him!
the moisture it carries crystallizes, and snowflake fall from the sky.
Look how thin that filament is there.
on the lower flank of Mount Erebus.
They're joined by thousands of whales. Minkes are the most numerous.
Humpback whales have come all the way from the Equator
The remnant of the sea-ice are occupied by sunbathing seals
For the caribou, the timing is critical.
A rupture deep within the glacier.
to frozen forests that encircle the entire globe.
and imprison 70% of the world's fresh water.
It lubricate the junction between the ice and the rock floor beneath,
They regroup and assess the damage.
This melt halve the size of Antarctica.
insulate from the cold air above.
It repel even powerful Minke whales.
Gavin is reassure by advice from the scientist.
Another battle won, though he has been slightly injure.
Further south still and stooped, shroud figures
that will be unveil by the spring melt.
This time they unleash a far more powerful wave
and the sun illuminate a giant frozen ocean,
The spill water then carve its way through the ice.
Only the toughest stay, as temperatures plunge
to grow into a stunt shrub.
seeded by strange bacteria that thrive in these extreme conditions.
are spawn by Greenland's glaciers,
The team have seize a rare opportunity to see into its molten heart,
Millions of tons are tumbling in slow motion into the valley.
which Scott and his men somehow traverse on foot.
Each spring the Arctic Ocean undergo an extraordinary transformation.
They're dominate and shaped by the ice,
Surviving here is so crushingly difficult
on its drive downwards towards the sea.
Each spring they come ashore to lay their eggs and rear their young.
The pod stays close together and travels silently.
sliding downhill into the ocean.
Beyond, a wholly unexpected landscape, the Dry Valleys.
The Poles are permanently capped with ice.
yet it was only 100 years ago that the first explorers walked inland
The breeze that gently sways these crystals
Nowhere is colder, windier or more hostile to life.
Wherever she goes he will follow, mating with her when she allows
exposing the rich waters beneath.
Somehow the seal manages to reach a tiny ice floe.
That's terrible. Oh, look, look. It fits perfectly, look. Look at that.
Somewhere below are spectacular ice caves,
Getting the team safely underground
Cameraman Jamie McPherson must pick his spot carefully.
The female eventually comes into view.
Sea lions normally eat fish,
no doubt relieved to resume his solitary ways,
Under the ice, life has to be extremely specialized to survive.
and their first sight of these mountains must have been daunting indeed.
from ice caps that hold nearly 80% of our planet's fresh water
But no, it seems penguins are uncatchable in water.
These are more docile and easier to tackle.
This sculptured spire is a remnant of a mountain,
eroded from all sides by the ferocious elements.
Together they make up the Taiga, an unbroken belt of forest
These icefalls are an ominous sign of what is about to happen.
It's steam from the molten heart of Mount Erebus,
It's a bleak, quiet world.
a sign that the prey they are seeking is formidable.
no doubt relieved to resume his solitary ways,
melted out by volcanic steam.
making flying extremely risky.
Insulated suits will keep them alive
and yet the icy worlds of the Arctic and Antarctic
and to land them on the fragile sea-ice.
fills the bays of the Arctic with exquisite ice sculptures.
This is the titanic force
a film camera proves to be rugged and reliable,
He locks onto her tracks, eager not to lose her trail.
to avoid the prying eyes of rival males who might disturb them.
The bison form a defensive circle around their young,
This meltwater has a surprising effect.
Using a range of waterproof lights and time-lapse cameras,