Description: [view in Spanish][edan-image:id=siris_sic_9227,size=110,left]Exchanging specimens is essential in botanical research: Herbaria swap their duplicates in return for specimens they lack. Such international trading is based on relations established through correspondence and research trips, relations that endure through generations of botanists. By the early twentieth century,
Description: [caption id="" align="aligncenter" width="413" caption="Exhibit of two giraffes and other animals from Africa. The exhibit is in the Hall of Mammals, National Museum of Natural History, 1959, by Unknown photographer, Photographic print, Smithsonian Institution Archives, Record Unit 95 Box 44A Folder 4, Negative Number: MNH-429."][/caption]