New research suggests the Arctic Ocean could be ice-free by 2015, with devastating consequences for the world.
In just a few decades, the same ship may be able to sail all the way to an ice-free North Pole.
That would have meant a fully re-vegetated (that is, lush with elk food) ice-free corridor.
Two rows of buoys marked an ice-free strip across the choppy face of the sea.
In this group of Islands is one which has an ice-free front.
Nor did it equal early spring, when trout streams were ice-free and the earth still too wet for plowing.
Once it was the only ice-free port in the whole of North China.
He had not yet gained complete control of an ice-free harbour.
Troops, munitions, supplies, must go down by rail to an ice-free port.
Along the ice-free coast a vessel could sail anywhere and pass out into the Pacific Ocean before the end of summer.