Description: [edan-image:id=siris_sic_5844,size=250,left]A staff-favorite story in the Smithsonian’s history is that of the Megatherium Club — a revolving group of young naturalists who made the Castle their temporary home in between expeditions to the outer reaches of the United States. Who could not be intrigued by this photo of the Club where they look to be sharing a joke, or a plan?
Description: [view in Spanish][edan-image:id=siris_sic_13396,size=150,left]Much of the Smithsonian's early natural history collections came from Mexico, the Caribbean, and Central and South America. The fourth Annual Report (1850) discusses several Latin American expeditions, in particular the exploration of islands near Nicaragua by Ephraim G. Squier, who served as U.S. charge d'affaires
Description: [edan-image:id=siris_arc_287602,size=250,left]As a child in England in the 1930s, Oliver Sacks enjoyed playing with his Uncle Abe’s spinthariscope. It was, he would later recall, “a beautifully simple instrument, consisting of a fluorescent screen and a magnifying eyepiece, and inside, an infinitesimal speck of radium.We take a look at the spinthariscope at the Smithsonian.