1. By Jenessa, Casandra, Tejada, Kenya

3. * Regions with a polar climate are characterized by a lack of warm summers. Every month in a polar climate has an average temperature of less than 10 °C (50 °F). Regions with polar climate cover more than 20% of the Earth. The sun shines for long hours in the summer, and for many fewer hours in the winter.

4. * Wolves are the top predators of the Arctic tundra, and polar bears dominate the frozen waters deeper in. Seals, killer whales, whales, sea lions, lions, walruses and narwhals can all be commonly spotted feeding on the fish in the Arctic Circle. The animals in Antarctica live on a very carnivorous diet.

13. * Approximately 1,700 species of plants live on the Arctic tundra, including flowering plants, dwarf shrubs, herbs, grasses, mosses, and lichens. The tundra is characterized by permafrost, a layer of soil and partially decomposed organic matter that is frozen year-round.

16. * Ice islands occasionally break away from northern Ellesmere Island; icebergs calved from glaciers in western Greenland and extreme northeastern Canada; permafrost in islands; virtually ice locked from October to June; ships subject to superstructure icing from October to May