Located well above the Arctic Circle, the site includes the mountainous Wrangel Island (2,937 square miles), Herald Island (4 square miles) and surrounding waters. Wrangel was not glaciated during the Quaternary Ice Age, resulting in exceptionally high levels of biodiversity for this region. The island boasts the world’s largest population of Pacific walrus and the highest density of ancestral polar bear dens. It is a major feeding ground for the...