The book presents a series of biographies of Decembrist naturalists who have made an outstanding contribution to the study of many regions of the world. Unique archival documents allowed the authors to recreate the images of G. S. Batenkov, M. K. Kuchelbecker, D. I. Zavalishin, V. P. Romanov, N. A. Bestuzhev, show their research in the Arctic, North and South America, Western Europe, Siberia, Australia.