100:00:02,360 --> 00:00:06,320At the ends of the Earth,200:00:06,320 --> 00:00:11,000out of sight in a frozen wilderness,300:00:11,000 --> 00:00:13,800there are signsthat the world is changing.400:00:21,120 --> 00:00:23,000Until a few years ago,500:00:23,000 --> 00:00:27,400the sea of Canada's far north wascovered by ice even in high summer.6
