These trees put their roots down in the permafrost, and the permafrost is thawing.

This building was built on the permafrost and has collapsed as the permafrost thaws.

One fifth of the earth's surface is covered by permafrost.

The Arctic region consists of a vast, ice covered ocean surrounded by treeless permafrost.

Actually, if current trends continue, it could all be gone in five or 10 years' time.

Methane is also beginning to escape from the permafrost.

It's also probably one the most vulnerable of the oldest living things, because if the permafrost melts, it won't survive.

That's why mountaintops have snow on them.

This is a rock field, and under the rocks, there is still some ice from the glacier.

The water in the ocean beneath it is warmer than the frozen ground in the Antarctic, and that warmth is transferred through the ice pack.

Forever

Never ever ...

Forever?

Eternal glory.

Arctic Circle

The Great North.

Geographic Pole

The Arctic is the area round the North Pole.

Permanently doubled my intellectual capacity.

Is this what you do with eternity?

It's a bit like this imagine that we'd only ever encountered Euclidean space.

They've survived for millennia in desert, in the permafrost, at the tops of mountains and at the bottom of the ocean.

Arctic, freezing, frigid.

Really? For good

This is a layer of soil that is permanently frozen, and in some places it's many feet deep.

We believe there's some water in the polar caps, there are polar caps of North Pole and South Pole.

JH Now is this electromagnetic here, or are these static?

I still don't know exactly what came over me, but my plan was to make a solo and unsupported crossing of the Arctic Ocean.

The area can be defined as the region between the Arctic Circle and the North Pole.

And the trucks go over the frozen ground.

Arctic Expedition.

As Earth warms, now because of extra CO2 we put in the atmosphere, ice will melt, and CO2 and methane will be released by warming ocean and melting permafrost.

So nighttime over here.

On our planet, we have two polar regions the Arctic, whose name comes from the Greek Arktikos, of the North, and the Antarctic from Antarktikos, opposite of the North.

They're going to get to land.

And then something about an Arctic Expedition.

And you can ask What happens to these moments?

I dreamed that

This baby's chopped permanent.

No constant.

You will have your forces

You will have your forces withdrawn from around my country,

You're back here for good.

Fresh water freezes at zero.

And I thought, in two days' time, I was going to do this swim across the North Pole.