Moose in Autumn Alpine Blueberries, Denali National Park, Alaska, USA

Northern Lights Illuminate a Snow-Covered Maule M-5, Fairbanks, Alaska, USA

Curtains of Colorful Northern Lights Above Fairbanks, Alaska, USA

Curtains of Northern Lights above Fairbanks, Alaska, USA

Bull Moose in the Autumn Tundra of Denali National Park at Sunset, Alaska, USA

Horned Puffins on Ledge of Lichen, Pribilofs, St. Paul Island, Alaska, USA

Curtains of Green Northern Lights Above the Brooks Range, Alaska, USA

Gentoo Penguins Silhouetted at Sunset on Petermann Island, Antarctic Peninsula

Horned Puffins on Ledge of Lichen, Pribilofs, St. Paul Island, Alaska, USA

Female Grizzly Bear Foraging Red Alpine Blueberries, Denali National Park, Alaska, USA

Mt. McKinley and Full Moon, Denali National Park, Alaska, USA

Mt. McKinley Reflected in Pond, Denali National Park, Alaska, USA

Adelie Penguins Dive from an Iceberg, Antarctica

Horned Puffins on the Cliffs at Zapadni Sea Bird Colony, Pribilofs, St. Paul Island, Alaska, USA

Gentoo Penguin and Chick, Antarctica

Totem Poles in the Sitka Totem Park, Alaska, USA

Aurora Borealis Above the Brooks Range, Gates of the Arctic National Park, Alaska, USA

Group of Adelie Penguins at Steep Face of an Iceberg, Antarctic Peninsula

Northern Lights Over Endicott Mountains, Gates of the Arctic National Preserve, Alaska, USA

Trans-Alaska Pipeline in Winter, North Slope of the Brooks Range, Alaska, USA

Iceberg Grounded near Shore in Paradise Bay, Antarctic Peninsula, Alaska, USA

Mt. McKinley and Autumn Foliage, Denali National Park, Alaska, USA

Gentoo Penguins Silhouetted at Sunset on Petermann Island, Antarctic Peninsula

Curtains of Northern Lights above Fairbanks, Alaska, USA