100:00:31,560 --> 00:00:36,639The sun is absent for up tohalf the year in the polar regions.200:00:36,640 --> 00:00:40,279When it returns,at the beginning of spring,300:00:40,280 --> 00:00:44,280its warmth will transformthis magical ice world.400:01:03,800 --> 00:01:08,680The greatest seasonal changeon our planet is now underway.500:01:15,680 --> 00:01:22,519