Konrad Wothe / Polar Bear (Ursus maritimus) adult portrait, Churchill, Manitoba, Canada

Thomas Mangelsen / Polar Bear (Ursus maritimus) adult walking towards camera on ice field, Churchill, Manitoba, Canada

Konrad Wothe / Polar Bear (Ursus maritimus) mother with two cubs, Churchill, Manitoba, Canada

Michio Hoshino / Polar Bear (Ursus maritimus) pair on snowfield, Churchill, Manitoba, Canada

Jim Brandenburg / Peary Caribou (Rangifer tarandus pearyi) running across snow field, Ellesmere Island, Nunavut, Canada

Jim Brandenburg / Arctic Fox (Alopex lagopus) on snow field, Ellesmere Island, Nunavut, Canada

Donald M. Jones / Bighorn Sheep (Ovis canadensis) rams crossing snowfield in spring, Glacier National Park, Montana

Sumio Harada / Mountain Goat (Oreamnos americanus) kid on snowfield with runoff in background, Glacier National Park, Montana

Yva Momatiuk & John Eastcott / Snow fields and cumulus clouds near Fortuna Bay, South Georgia Island

Yva Momatiuk & John Eastcott / King Penguin (Aptenodytes patagonicus) group on snowfield, South Georgia Island

Sumio Harada / Mountain Goat (Oreamnos americanus) pair resting in snow field with glacier in background, Yoho National Park, Rocky Mountains, Canada

Jim Brandenburg / Snowfield and icebergs, Ellesmere Island, Nunavut, Canada