cheap ray bans uk How Polar Bears Work

How Polar Bears Work

Polar bears have captivated humans since the beginning of recorded time. in ancient Rome describe flooded amphitheatres where polar bears and seals were pitted against each other (not much of a fight, as it turns out). Kings of ancient Egypt and early Norway were the first to keep polar bears captive, and the fascination with them has held through the centuries [source: Polar Bears International]. A terrifying version of the animal inexplicably shows up on a tropical island in the TV series "Lost." Ad campaigns all over the world feature polar bears to sell everything from bottled water to transportation systems to soda.

Polar bears’ shocking whiteness, ferocity and sheer size make them icons of purity and power. Males can grow up to 10 feet tall and weigh up to 1,700 pounds. A single bear can take on a 2,500 pound walrus, and hang onto the massive catch with 2 inch claws. They walk hundreds of miles across ice sheets every winter, following their prey.

In the Arctic, polar bears are at the top of the food chain, and it’s not just because of their size. They’re so well adapted to their environment that they experience no change in body temperature at 34 degrees Fahrenheit ( 37 Celsius). However, the incredible survival mechanisms that let them thrive in frigid winters may prove to be their undoing. Because of global warming, winters are getting less cold and polar bears are dying. Scientists project that if climate trends continue, polar bears could be extinct by 2050 [source: Polar Bears International].

What’s life like for an animal that needs such extreme cold to survive? Let’s head to the Arctic and see how polar bears live on the ice.A Coca Cola ad campaign in the 1990s added "adorable" to the polar bear’s image. The ads featured a clumsy, animated cub that bridged the natural wariness between polar bears and penguins to share a nice, cold bottle of Coke. Polar bears don’t actually have a natural wariness of penguins, as the two don’t live in any of the same regions and never see each other. But still, cute is cute.

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