Canada's Devon Island is the largest uninhabited island in the world--and with good reason. Temperatures below freezing for nine months of the year and an annual rainfall comparable to the Gobi Desert leave the icy landscape so barren that NASA uses it to simulate conditions on Mars. Take an exhilarating expedition into a land where only the most experienced Inuit hunters dare set foot.
Tanzania's Mount Kilimanjaro is the highest freestanding mountain and volcano in the world. Join wildlife expert Jean du Plessis as he makes the perilous summit climb through its five vastly different climates to understand how quickly its famed glaciers are melting.
From mountain zebras to shy and secretive caracals, Karoo National Park showcases a diversity of creatures who have adapted to demanding environmental conditions. Scale the varying altitudes of this nature reserve's vast landscape.
For spotted hyenas, Luangwa Valley is full of threats, including predatory lions, furtive leopards, and even resentful relatives. Meet Spotty, the youngest daughter of an alpha female hyena. She's the heir apparent to the powerful Chimbwe clan, but she'll need to assert herself if she's to assume her rightful place as matriarch-in-waiting. Will she survive to adulthood and take on the throne?