Who doesn't love the big, burly white bears of the north? Polar bears—at the top of the food chain and vital to the health of the Arctic marine environment—are important to the cultures and economies of Arctic peoples.

Polar bears’ lives depend wholly on the sea, their main source of food, and the place they spend most of their lives. But as the climate warms, that ice is melting, threatening polar bears.

Take a look at some interesting facts about polar bears: