who, in his words, "lost his appointment as a university professor because of racial politics". Following the publication of Sprengers and Schnödls book, there have been discussions about Uexkülls role in the early 1930s. As Sprenger and Schnödl show, there are no reliable historical sources for many of the assumptions that have been used to defend Uexküll. These anecdotes are taken from a biography of Uexküll written by his wife, Gudrun von Uexküll, in 1964. This book defends Uexküll against all accusations, but does not give any reliable sources or references. For example, Carlos Brentari refers to Uexkülls autobiographical book of personal reminiscences, Nie geschaute Welten (Worlds never seen). Brentari argues that in this book, Uexküll wrote favorably of the Russian Jews and the Baroness Rothschild. He even states that the book officially banned from display in bookshop windows. This assumption has turned out wrong: The book is not listed on any of the National Socialist's lists of banned books. And, contrary to Brentari, Uexküll takes up the idea of the Jews as "parasitic plants" which only grow where they belong. As Sprenger writes: "This rhetoric already holds the germ of the idea that the host must rid itself of this parasite, despite all sympathies he may harbor for individual members of the alien race, and thus end the supposed abuse of his hospitality. It is precisely because the Jewish population is understood as a parasite that it can, in Uexküll's representation, be so easily expelled: transplanted elsewhere, it will be able to live just as well; but there, too, it may also spread parasitically." In popular culture Uexküll's ideas about how organisms create their own concept of time are described in Peter Høeg's novel Borderliners, and contrasted with Isaac Newton's view of time as something that exists independent of life. See also List of Baltic German scientists Jakob von Uexküll Centre Copenhagen–Tartu school References Cited sources and other sources Thure von Uexküll. 1987. "The sign theory of Jakob von Uexküll." In: Krampen et al. 1987. Classics of Semiotics. New York: Plenum, pp. 147–179. Jakob von Uexküll, Mondes animaux et monde humain, Jakob von Uexküll, "A Stroll Through the Worlds of Animals and Men: A Picture Book of Invisible Worlds." In Instinctive Behavior: The Development of a Modern Concept, edited and translated by Claire H. Schiller, New York: International Universities Press, 1957, pp. 5–80. Jakob von Uexküll, A Foray Into