Inline Images: 
Joseph P. E. Morrison working aboard a ship at Bikini Atoll, 1947.
Paleobiologist G. Arthur Cooper conducting filed work at Glass Mountains, Texas, 1957.
Retired Smithsonian scientist still engaged in research in the field, prospecting with metal detectors in Henbury, Australia for meteorites, 1965.
F. Raymond Fosberg, a botanist known for his work in conservation, examining a native tree in Sri Lanka, 1978.
Entomologist J.F. Gates Clark on a hillside in British Columbia, Canada, collecting insects, 1980s.
Smithsonian Secretary and ornithologist Alexander Wetmore and taxidermist Watson M. Perrygo preparing specimens in Panama, 1949.
A. Stanley Rand, a herpetologist and Senior Biologist at STRI, capturing the sound of frogs in Panama, 1996.
Anson Hines of the Smithsonian Environmental Research Center, holding a crab with a telemeter tracker attached to its shell, 1986.
Diane and Mark Littler in snorkeling gear doing algae research at the Smithsonian Marine Station at Link Point, 1984.
Three scientists, including Linda McCann (left) of the Smithsonian Environmental Research Center, sampling water in Baltimore Harbor, 1994.