Polar bears are the largest terrestrial carnivore in the world. The sight and hearing of polar bears are comparable to those of humans, but their sense of smell is extremely sensitive, 7 times that of dogs. Due to the rise in global temperature, the ice floes in the Arctic have gradually begun to melt, and the former home of polar bears has been destroyed to a certain extent. It is likely to become extinct in the near future and needs human protection.
Polar bears are called "white bears". In fact, their fur is not white, and the middle of their fur is hollow. It looks white after the sunlight is refracted, and this hollow hair can be waterproof and thermally insulated. This construction reflects sunlight onto the dark skin beneath the hair, helping to absorb more heat. And polar bears' feet are covered with dense fine hairs, allowing them to walk steadily on ice, so polar bears can live in the cold polar regions.
There is a small town on earth that has more polar bears than people. That is Churchill in northern Manitoba, Canada. There are about 20,000 bears here. From September to November every year, nearly 1,000 polar bears are active nearby for predation. The total population of the town is only about 800 people.
Polar bears greet each other with a nose-bump when asking for something like food. If a bear is polite, it will be allowed to share food with its companions. Polar bears can easily get their fur dirty while eating, and in the absence of water, they will stick their heads and belly to the snow and crawl to clean up the stains. The first Coca-Cola polar bear commercial came from a French print ad in 1922. The ad featured a polar bear cooling the sun with a bottle of Coca-Cola.
Photographer Morgan once saw a polar bear glide across the ice on its stomach to avoid falling into the icy waters. So it can only try to expand its body area, lower its center of gravity, and try not to fall. In the photo, the polar bear can also be seen testing its front feet forward to assess whether the thin ice in front of it can support its weight. Walking on thin ice at risk of life is most likely to forage for food.
"National Geographic" magazine reported that last summer, researchers in Canada's northern Arctic Circle surveyed a rare video of a male polar bear preying on a similar bear cub. Experts say the event may be linked to climate change causing food shortages for polar bears. At present, the whole world is warming, and the temperature of the earth's Arctic is also rising, causing the Arctic sea ice to melt, which does bring a great crisis to the survival of polar bears, including: the living range is reduced, the food is less, and it is particularly difficult to capture food.
According to Guinness World Records, the oldest polar bear was Debbie, a female polar bear living in Canada, who lived to the age of 42 before she was euthanized due to multiple organ failure. Polar bears are polygamous. They mate in the spring, from March to May each year, when the estrus period is only about 3 days, and the male and female polar bears are paired briefly for the purpose of family inheritance rather than permanent bonding. The male bears have to fight each other for mates. Facing the single women they like, they have to express their love to the opposite sex through fierce fights, so as to be accepted by the other party.
Some people ask if polar bears can survive in Antarctica? The answer is yes! Antarctica is also a cold environment, and there are seals and scale shrimp that polar bears often eat, and even delicious penguins. However, polar bears are unlikely to travel through it unless it is transported by humans.
