Who is the young Arctic overlord?

Polar bear: Arctic overlord sitting in the "Ice City" On February 5, 2006, polar bear Knut and his brother were born in Berlin Zoo, Germany. Knut's brother died because his mother refused to feed him. Knut spent the first 44 days of his life in an incubator. This little creature from the North Pole touched the hearts of Germans. On March 23rd, 2007, Knut made his first public appearance. German Environment Minister Sigma announced the formal adoption. Since then, due to global climate change, Knut has been endowed with the symbol of endangered species and spoke for the 2008 Bonn Endangered Species Conference. Photographer Anne took many photos for Knut for environmental protection publicity activities. Flock, nicknamed "Snowflake", was born in Nuremberg Zoo in February 2007. The zoo's original plan was to let the mother bear breastfeed the sheep. There was a tragedy in the zoo at that time. A female polar bear ate her cubs. For safety reasons, the zoo decided to feed the sheep artificially. Flock's first public appearance caused a sensation in the media and became the darling of the media. Its owner, Nuremberg Zoo, has also become a popular attraction. Flock's name is registered as a trademark, and its image also appears in advertisements and toys. In May 2008, Steiner, Executive Director of UNEP, became an official sponsor of flock. Later, as an environmental ambassador, flock promoted people's understanding of climate change. Knut's brilliant career lasted only four years and three months. On the 20th11March19th, it died without warning. At that time, more than 600 tourists witnessed this heartbreaking moment at the scene. And flock is still working hard for environmental protection. Dear readers, if you visit Nuremberg Zoo, you will surely see an environmental protection brochure with the image of flock printed on it. White Bear When it comes to polar bears, people think of a female bear with a cute little bear and a big white ass wriggling around in the vast snowfield. For this reason, polar bears are also called "white bears". If you think that the skin of a white bear must be very white, you are wrong. Polar bear's skin is not only not white, but also black. If you don't believe me, look at its face: the secret of dark skin is revealed around its nose, lips and eyes. Polar bears have almost the same sight and hearing as humans, but their sense of smell is amazing. Not only far more than humans, but also more than dogs with a keen sense of smell. It can capture the smell in the depth of Fiona Fang 1 km or in the ice and snow 1 m, which is quite amazing. It is found that polar bears spend about 66.6% of their life in a "static" state, or sleep or lie down or wait for their prey; 29. 1% time to walk or swim; Only 1.2% of the time is attacking prey. Tips Although white is beautiful now, don't look down on black skin. Dark skin is not good-looking, but it helps to absorb heat. For polar bears living in ice and snow, this is a good "lining" to keep out the cold and keep warm. Polar bear fur can be divided into two layers, the upper layer is smooth and long, and the lower layer is short and dense. This structure can not only lock the air, but also prevent the infiltration of water, which is beneficial to the amphibious hunting career of polar bears. Wool "woven" into a white coat is actually a colorless and transparent hollow structure, and white is only formed by sunlight refraction. This structure is like the inner container of a thermos bottle, which isolates the convection of the inside and outside air and protects the heat in the body from loss. Comments: With global warming, this feature of polar bears has also become a "short board" that restricts it. A little activity will make polar bears overheat. If the trend of global warming is not contained, the extinction crisis of polar bears will not be eliminated. Source: Encyclopedia Exploring the Underwater World