简介:In the ice女人-gripped environment of Alaska's Admiralty Island, summer offers the briefest of re一个spites. Year-round residents such as bears and sea水真ls turn to the salmon-filled waterways for sustenance. Meanwhile, migrants descend in droves, from humpback whales to ov毛片er 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.