Okay. We had a team out watching this glacier, and we recorded the biggest calving event that's ever been put on film.

Okay. We had a team out watching this glacier, and we recorded the biggest calving event that's ever been put on film.

Drangajökull Glacier

June 25th, monster calving events happened.

A 400 foot tall calving face breaking off.

This is a view of what's called the calving face.

That's the retreat of this glacier.

Helicopter in front of the calving face for scale, quickly dwarfed.

Ice streams are a type of glacier.

We're up beyond the , above the glacier.

We're now at the Columbia Glacier in Alaska.

This is pitched on a glacier at 17,500 feet.

I actually made a device called the Glacier Embracing Suit.

Brown Glacier, Heard Island, had retreated by 50 metres over three years, with the lower slopes of the glacier having lost as much as 11 metres in thickness, while Collins Glacier, King George Island, retreated by some 200 metres between 1987 and 2005.

The one glacier up in Greenland that puts more ice into the global ocean than all the other glaciers in the northern hemisphere combined is the Ilulissat Glacier.

The one glacier up in Greenland that puts more ice into the global ocean than all the other glaciers in the northern hemisphere combined is the Ilulissat Glacier.

During this period, there were several changes between glacier advance and retreat.

This compression is seen when the glacier calves, creating a blue iceberg.

No. It was retreating through the winter because it's an unhealthy glacier.

This glacier has doubled its flow speed in the past 15 years.

A mile of retreat in 75 minutes across the calving face, in that particular event, three miles wide.

A mile of retreat in 75 minutes across the calving face, in that particular event, three miles wide.

According to scientists, in 100 years all the mountain glacier will be gone.

But this glacier caved into the water and a seal got on it.

And to the right hand side of us was this great Khumbu Glacier.

We might wind up there yet, too, chasing Fry over the old glacier!

I've known women from one end of this frozen glacier to the other.

We just downloaded these pictures a couple weeks ago, as you can see. June 25th, monster calving events happened.

We don t hear that the Wilkins glacier makes up less than 0.01 of Antarctica.

In the Andes, this glacier is the source of drinking water for this city.

When I meet a glacier for the very first time, what do I do?

And all the way along the glacier we saw these big pools of melting ice.

If you look in the middle background, you can see the calving face bobbing up and down like a yo yo.

We'll leave here this afternoon, in about an hour. We'll go as far as the glacier.

To give you a little bit of a sense of scale, that calving face in this picture is about 325 feet tall.

We have some cameras on the south edge of the Ilulissat, watching the calving face as it goes through this dramatic retreat.

The glacier on Puncak Trikora in the Maoke Mountains disappeared completely some time between 1939 and 1962.

Like Al Gore told you, two billion people live on the water from the glacier of Himalaya.

You know, if you were anybody but Constance Petersen... the human glacier and the custodian of truth...

They get you on top of some glacier point out the sunset, and suddenly, like an avalanche....

Friction makes the ice at the bottom of the glacier move more slowly than ice at the top.

This lake has been formed in the last couple of years because of the melting of the glacier.

You see the glacier flowing in from the right, dropping off into the sea, camera shooting every hour.

This very basic shift in my physical orientation helped me shift my perspective in relation to the glacier.

To give you a little bit of a sense of scale, that calving face in this picture is about 325 feet tall. That's 32 stories.