简介:In the ice-gripped environment of Alaska's Admiralty Island, 亚洲summer offers the briefest of respites. Year-round residents such as bears and seals tur在线n to the salmon-fi精品lled wate网站rways for sustenance. Meanwhile, mi成人grants descend in droves, from humpback whales to over 140 million seabirds--almost half the birds in the Northern Hemisphere.详情
David Attenborough follows the remarkable story of the discovery of fossils in the Patagonia region of Argentina which prove to belong to the largest animal to ever walk the Earth.