Siebren van der Werf
Siebren van der Werf is a Dutch physicist and author of non-fiction books.
Van der Werf worked as a researcher at the Kernfysisch Versneller Instituut in Groningen. He retired in 2004.
After retirement, van der Werf concentrated on writing popular books and articles on navigation tools and atmospheric phenomena. In Drieduizend jaar navigatie op de sterren he discusses the development of the navigation tools from Ancient Greece and Polynesia to the 20th century.