Description: With nineteen museums and research centers, the Smithsonian Institution is so much more than just the buildings on the National Mall in Washington, D.C. In fact, if you drive about 33 miles east of the National Mall, you will find the Smithsonian Environmental Research Center (SERC), located in Edgewater, Maryland, and this year, the site is celebrating its 50th Anniversary.
Description: President Calvin Coolidge's second inauguration in 1925 reaches an audience of millions, thanks to a new technological innovation--the radio.
Description: A rare meeting of the scientific minds at the 92nd Annual British Association Conference in 1924, captured by Science Service journalist Watson Davis.