Dr. Edward S. Ayensu, by Sandved, Kjell Bloch 1922-, 1975, Smithsonian Archives - History Div, Dr. Edward S. Ayensu, Ghanaian economist, scientist, and Director and Senior Scientist, National Museum of Natural History (NMNH) at the Smithsonian Institution, Washington, D.C., is seated in front of a microscope. Shelving in front of him holds books..