Examining the power ice has in shaping the environment. Included: ice sheets of Antarctica; a unique ice lab in the Arctic, north of Norway; and a CGI re-creation of a cataclysmic flood in the Ice Age-era Pacific Northwest.
Examining the forces that have formed Earth. First up: volcanoes and plate tectonics. Included: Ethiopia's Erta Ale lava lake; the mid-Atlantic ridge in Iceland; New Zealand's Southern Alps. Host: Iain Stewart.