The tiny fire point above the Dipper, the Polaris. The main star of the northern pole. Guide on that.

So the North Star corresponds to the center of the device.

Over my shoulder and we go south.

We're finding more and more dead bears in the Arctic.

But one area which is particularly intriguing for us is the northern region, you know, of Mars, close to the North Pole, because we see ice caps, and we see the ice caps shrinking and expanding, so it's very much like you have in northern Canada.

I spent time skiing across the sea ice for weeks at a time in the high Arctic.

You know, this is the north pole.

Polar orbiting satellites pass near the North and South Poles 14 times a day.

We can now go to the Arctic.

We were trying to ski from this group of islands up here, Severnaya Zemlya, to the North Pole.

Last night of all, when yon same star that's westward from the pole had made his course into that part of heaven where now it burns,

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

We know from experimentation when we were all kids, this is the north pole, this is the south pole.

We carried on sailing through the ice packs towards the North Pole.

It's the first mission that's going to try to land near the North Pole of Mars, and it's the first mission that's actually going to try and reach out and touch water on the surface of another planet.

But in general, when most people refer to magnetic north, or the north pole, they're talking about the geographic north area.

Today I want to talk to you about swimming across the North Pole, across the most northern place in the whole world.

It is the ultimate scarce resource, the one planet that we share.

They said, oh, well the side of the needle that is pointing to the Earth's north, let's call that the north pole.

Anybody want to come with me to Antarctica or the Arctic, I'll take you let's go.

We've just seen our first polar bears.

And the thing that fascinates me about the North Pole, geographic North Pole, is that it's slap bang in the middle of the sea.

We were attacked by a polar bear on day two.

So we carried on sailing and we arrived at the North Pole.

Next week I'm at Electrolux in Sweden, then I'm in Beijing on Friday. You work that one out.

And now, it is my great pleasure to introduce to you the star of our show.

And there is a bright star called Deneb. So let's select Deneb.

Where this will be the south, this'll be the north, this'll be the south, this will be the north.

Magnetic north is the geographic location, where the north pole of a magnet will point to.

And you'll see that it leads with a shifting star field, and there's an Aurora Borealis in the background, kind of morphing with color. The color of the Aurora Borealis can be controlled using this single bar of color at the bottom, and we'll put it down here to red.

And this is actually a little bit obviously we call the top of the Earth the north pole.

We'd skied 400 miles. We were just over 200 miles left to go to the Pole, and we'd run out of time.

With a considerable extent of its land and territorial waters, low population density and sub Arctic to Arctic weather, Norway benefits greatly from the (mainly) United States satellite navigation system, GPS.

So if this side of my magnet is attracted to Earth's north pole then Earth's north pole or Earth's magnetic north actually must be the south pole of that magnet.

They are the most remarkable animals I've ever worked with, and the same with polar bears.

Such as the Arctic we have one chance, right now, to get it right.

Actually, we would save less than one tenth of a polar bear.

North Pole goes to the South, South Pole goes to the North, and vice versa.

As just one example of its many uses, RADARSAT has proven very successful in the Canadian Arctic.

There was so much ice in 1992, the following year, that there was a bumper crop of polar bear cubs who were known as the Pinatubo cubs.

Projections are that we could lose polar bears they could become extinct in the next 50 to 100 years.

Find the Big Dipper.

But of course, we've spread to every corner of the globe and in Arctic Canada, where I live, we have perpetual daylight in summer and 24 hours of darkness in winter.

He makes the Bear, Orion, and the Pleiades, and the rooms of the south.

He makes the Bear, Orion, and the Pleiades, and the rooms of the south.