简介:In the ice在线-gripp午夜ed en真色vironment of Alaska's Admiralty Island, summer offers the briefest of respites. Year-round residents such as bears and seals turn to the salmon-filled waterways for sustenance. Meanwhile, migrants descend in dro福利ves, from humpback whales to over 140 million seabirds--almost half the birds in the Nor视频thern Hemisphere.详情
David Attenborough explores the rise of life on our planet, from the explosion of first life on seabeds hundreds of millions of years ago to life today.