Description: It can be so frustrating to put great effort into something, and then to have your work and achievements called into question. I can't begin to imagine how frustrated Samuel Pierpont Langley was in 1903. By that time, he had spent over forty years studying astrophysics and aerodynamics. His work on astronomically-derived time measurement in the late 1860's is the heart of the
Description: [view in Spanish][edan-image:id=siris_sic_6874,size=185,left]Alexander Wetmore, ornithologist and avian paleontologist, was the Smithsonian's sixth Secretary (1945-1952). As a young biologist with the U.S. Bureau of Biological Survey, Wetmore conducted extensive fieldwork in Latin America. He spent 1911 in Puerto Rico studying bird life, and later traveled through South