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The article presents the biography of arachnologist Ferdinand Karsch-Haack, reprinted from the journal's website. He was born on born on September 2, 1853 in Münster, Germany and later served as Curator at the Zoological Museum of the Friedrich-Wilhelm University in Berlin, Germany. Topics include his essays on sexual diversity of animals; sexual diversity among primitive people; and his views against medicalization of same-sex sexual relation.

The article presents a biography of author Magnus Hirschfeld. Hirschfeld was born on May 14, 1868 in Germany, and studied modern languages in Breslau, and medicine in places like Strasbourg, and München. His professional achievements include biological deconstruction of Western ideology of sexual dimorphism. He had sexual relationships with people like Karl Giese, the archives director of the Institute of Sexual Science.