Stratified Rock, Pemaquid Point, Maine, July 18, 1984

White Rocks, Skokie Beach, Great Spruce Head Island, Maine, July 30, 1984

Fungus on Tree Trunk, Great Spruce Head Island, Maine, July 2, 1983

Boulder and Trees, Great Spruce Head Island, Maine, July 2, 1983

Bleached Stump, Great Spruce Head Island, Maine, July 9, 1983

Salt Grass, Blueberry Cove, near Rockland, Maine, July 17, 1984

Mosquito Point, Camden, Maine, 1982

Roots, Great Spruce Head Island, Maine, August 1, 1984

Weddell Seals (Leptynochtes weddelli), Hutton Cliffs, Near Hut Point Peninsula, Antarctica, 1975

Weddell Seals, McMurdo Sound, Antarctica, December 1975

Emperor Penguins, McMurdo Sound, Antarctica, December 1975

Scott's First Hut, Antarctica, December 1975

Weddell Seal Breathing Hole with Penguin and Seal Tracks, McMurdo Sound, Antarctica, 1975-1976

Koettlitz Glacier, Frozen Pond, near Royal Society Range, Antarctica, December 1975

Koettlitz Glacier, Frozen Pond, near Royal Society Range, Antarctica, December 1975

Emperor Penguins, McMurdo Sound, Antarctica, 1975-1976

Emperor Penguins, McMurdo Sound, Antarctica, 1975-1976

Don Juan Pond, Wright Valley, Antarctica, December 19, 1975

Tall Seedling on Edge of River, Mile 197, Grand Canyon, Arizona, June 28, 1967

Looking Out [of the] Canyon, near Upset Rapid, Grand Canyon, Arizona, September 20, 1967