The Passumpsic valley and the Greenland Ice Sheet share rivers flowing from receding ice sheets. Melting glaciers deposit ...
Antarctica, the world watches in stunned silence as nature displays its unstoppable power. The sight of an enormous slab of ...
Though Greenland appears as a vast blanket of ice, a secret world lies far below its frozen surface. Buried under nearly three kilometers of ice are mountains, deep valleys, and ancient river systems ...