Description: [caption id="" align="aligncenter" width="425" caption="Dr. Judith A. Blake, biological technician at the Smithsonian's new Molecular Systematics Laboratory operated by the National Museum of Natural History at the Smithsonian's Museum Support Center in Suitland, MD, stores tissue samples from plants and animals at temperatures of -148 degrees Fahrenheit, 1990, by Harold E.
Description: The National Postal Museum was established in 1990 under an agreement between the Smithsonian and US Postal Service to preserve and display the National Philatelic Collection, formerly part of the National Museum of American History. The Postal Museum moved to the Washington City Post Office Building on Capitol Hill in 1993. History of the National Postal MuseumAdditional