The Arctic, like the rest of the world, experiences natural cycles, and some of them can be pretty radical. While most of the world enjoys a pretty stable 24-hour cycle of sunrise and sunset, with the sun visible roughly half of each day, a little longer in summer, a little shorter in winter, the Arctic (like the Antarctic) goes from 24-hour sunlight in mid-summer to 24-hour darkness in mid-winter. Long-term geologic records indicate that it also experiences larger swings from warmer to colder … [Read more...]