简介:In the ice-gripped environment of Alaska's Admiralty Island, summer offe丝片rs the briefest of re在线观看spites. Year-round residents such as bears and seals turn to the salmon-filled wa秋霞terwa电影网ys for sustenance. Meanwhile, migrants descend in droves, from humpback午夜 whales to over 140 million seabirds--almost half the birds in the Northern 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.