简介:In the ice-grip香线ped environment of Alaska's Admiralty Island, summer offers the briefest of respites. Yea精品r-round residents such as bears and seals turn to the salmon-filled waterways for sustenance. Meanwhile, migrants descend in droves, from humpback whales to over 140 million伊人 seabirds--almost half the birds 久久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.