1.   Arctic ice was both a hazard and a haven, its jagged downward spikes threatening to pierce submarines as well as providing visual and acoustic cover.

2.   Because it reflects sunlight and thus helps make a cold place even colder, widespread melting of arctic ice could accelerate a warming trend.

3.   A bit later he was reading an article in National Geographic about Eskimos and a weird strain of virus found frozen in the Arctic ice.

4.   Abandoned in the Arctic ice west of Greenland, the magnificent ship was later rescued by the valiant captain of an American whaler.

5.   Abandoned in the Arctic ice near Davis Strait, west of Greenland, the magnificent ship was later rescued by the valiant captain of an American whaler.

6.   Even harp and hooded seals that once were not seen south of arctic ice floes have been showing up in Nantucket Sound, according to the New England Aquarium.

7.   He published a richly illustrated account of his experience that enabled people to understand for the first time what arctic ice was like.

8.   People were surprised, even a little shaken, when recent news reports claimed that Arctic ice is melting.

9.   Signs of global warming range from a rise in sea levels to record floods to a decline in the Arctic ice cover.

10.   Sometimes it is like a real hard snap, he says, a cold thunder fired through the blue Arctic ice.