"Will Steger" in 1986, the 1,600-mile south-north traverse of Greenland - the longest unsupported dogsled expedition in history at that time in 1988, the historic 3,471-mile International Trans-Antarctic Expedition - the first dogsled traverse of Antarctica (1989–90), and the International Arctic Project - the first and only dogsled traverse of the Arctic Ocean from Russia to Ellesmere Island in Canada during 1995.

Steger had been invited to testify before Congress on polar and environmental issues based on his first-hand experience in the Polar Regions and environmental expertise.

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We knew this was happening 15 years ago. But it's only been in the past few months that the information has been spread by the media.

An incredible experience and humbling all the way through.

I don't think there's any way we can save the polar bears.

Within 10 years it will be impossible to travel to the North Pole by dog team. There will be too much open water.

If we could cut carbon dioxide emissions by 80 percent over the next 20 years we could perhaps prevent this. If we continue burning fossil fuels as we are today in the very near future (the ice shelf) will slip in (the ocean).