Description: Rotunda of the United States National Museum Natural History Building, now known as National Museum of Natural History, 1913, SIA RU000095, USNM No. 22339.
Description: For Social Media Day, we’re recapping how a Facebook follower solved an archival mystery by giving a name to our most popular “unidentified male model.”
Description: United States Fish Commission research station, possibly along the Potomac River, 1880s, Glass negative [double exposure], SIA Acc. 11-006, MAH-5600.