Wild Animals You May Know
A bison is squeezed into a chute to take a blood sample as part of the brucellosis eradication program.
Cutting through a 33-foot drift at Lake Helen, Lassen Volcanic National Park.
Expert snow rangers from Snoqualmie National Forest drill Mount Rainier National Park rangers in emergency procedures to probe for an avalanche victim.
Archaeologist and assistant plot the Step House Ruins at the Wetherill Mesa laboratory.
The Cliff Palace at Mesa Verde National Park, one of the best preserved prehistoric cliff dwellings in the United States.
©1928, 1929, 1934, 1972, Horace M. Albright and Frank J. Taylor