Molting Adélie Penguins, Cormorant Island, Palmer Station, Antarctica, February 14, 1976

720. Berthoud Pass, north

St. Maria de Coyotepec, "Josef"

A Planoette… Hilary

Sand Dunes, Grass, Snow, Great Sand Dunes National Monument, Colorado, September 30, 1959

Black-eyed Susan in Grass, Passaconaway Road, New Hampshire, October 4, 1956

Arctic Tern, Matinicus Rock, Maine, July 31, 1949

Arctic Tern, Matinicus Rock, Maine, July 31, 1949

Black-eyed Susan in Grass, Passaconaway Road, New Hampshire, October 4, 1956

Black-eyed Susan in Grass, Passaconaway Road, New Hampshire, October 4, 1956

Beech Grove, Road to Clingman's Dome, Great Smoky Mountains National Park, Tennessee, April 26, 1968

Giant Lobelia Seedling, Upper Teleki Valley, Mount Kenya, Africa, February 14,1970

Floating Leaves and Reflections, Aspen, Colorado, October 3, 1951

Strangler Fig Roots, Everglades National Park, Florida, March 7, 1954

Wiencke Island, Bismarck Strait, Antarctic Peninsula, Antarctica, February 1976

Dog Skeleton, Robert Scott's Hut, Cape Evans, Ross Island, Antarctica, December 1975

Killer Whales (Orcinus orca), McMurdo Sound, Antarctica, January 1976

Mountain Peak, near Bismarck Strait, Antarctica, February 1976

Don Juan Pond, Wright Valley, Antarctica, December 1975

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