the jazz said this may be the last chance for humans to appreciate the scene before the earth's climate changes drastically. sir attenborough, 85, said, "this documentary captures many behaviors and phenomena that have never been recorded before. over time, these images will become more and more precious because it is likely our last chance to record these precious scenes. although the scene at the poles of the earth was spectacular hundreds or even thousands of years before we arrived, many changes have exceeded people's understanding in the past century." the crew of frozen earth filmed with special cameras that could work at low temperatures. this documentary, which took five years to come out, captures many precious images and shows the mysterious and fantastic side of nature: including the collapse of icebergs and the mysterious eruption of active volcanoes, as well as the rock peaks, the beautiful melange lakes and coniferous forests; in addition, these real pictures also show the cruel side of nature, the competition and fighting between animals, such as a male polar bear bravely repelled up to 10 love rivals, covered in blood stains and scars, and finally brought the beauty back. this documentary also often captures how some creatures work together to hunt prey, such as killer whales jointly hunt seals. with the help of high-tech equipment, the crew also recorded the vast and deserted land in the heart of the antarctic continent, and the process of whales migrating to the polar regions. the entire documentary is based on seasonal changes, recording various scenes displayed on the poles of the earth in a year, from the "great melting" spring, to the summer when the light is shining 24 hours a day, to the "great frozen" autumn, and finally ending with the long night of winter. the documentary ends with some interesting adventures and tips on how to survive in extreme cold and unpredictable harsh climates.