Polar Imperative: A History of Arctic Sovereignty in North America by Shelagh D. Grant
Map of where bears live in North America
Weakening polar vortex may yield longer, harsher winters in North America | AccuWeather
January–February 2019 North American cold wave - Wikipedia
What is the polar vortex – and how is it linked to climate change? | US weather | The Guardian
What Does 'America First' Look Like in the Arctic? | RAND
Polar Bear Facts: Animals of North America - WorldAtlas
In pictures: Polar vortex strikes North America - BBC News
Life on the edge: Iñupiat communities and polar bears on Alaska's wild North Slope | National Geographic
What 5 Million Data Points Tell Us About the Polar Vortex's Impact on Energy Use | Greentech Media
Polar Bear Watching Trips: Tailor-Made Ideas and Group Tours | Wildlife Worldwide
Polar Lights Model Kit – Captain America | Lake City Hobbies
Polar vortex coming in November: Arctic blast to central, eastern U.S.
Polar Bears Migrate from America to Russia as Temperatures Rise
Arctic Weather Plunges into North America
Weakened 'polar vortex' blamed for N. American chill
See all 70 polar bears in North American Zoos (interactive) - oregonlive.com
From Trout to Polar Bears: How the Environmental Movement Lost America - The American Conservative
Arctic Weather Plunges into North America
Polar Vortex Building in North America
America and Russia work together during challenging times | WWF Arctic
