question: Who developed the diagram known as a spacetime diagram,and was a professor at Königsberg, Zürich and Göttingen?
answer: Hermann Minkowski
context: Title: Minkowski diagram
  Passage: The Minkowski diagram, also known as a spacetime diagram, was developed in 1908 by Hermann Minkowski and provides an illustration of the properties of space and time in the special theory of relativity.  It allows a qualitative understanding of the corresponding phenomena like time dilation and length contraction without mathematical equations.
  Title: Hermann Minkowski
  Passage: Hermann Minkowski ( ; ] ; 22 June 1864 – 12 January 1909) was a mathematician and professor at Königsberg, Zürich and Göttingen.  He created and developed the geometry of numbers and used geometrical methods to solve problems in number theory, mathematical physics, and the theory of relativity.
  Title: Carl J. Wiggers
  Passage: Carl J. Wiggers (May 28, 1883 – April 28, 1963), famous for his heart and blood-pressure research, was born in Davenport, Iowa to George and Margret Kuendal Wiggers, graduated from the University of Michigan with a M.D. in 1906, and attended the Institute of Physiology at the University of Munich.  He was an instructor of physiology at the University of Michigan (1906–11), and assistant professor at Cornell University Medical School (1911–18).  From 1918-53, he was professor and chairman of the Dept. of Physiology at Western Reserve University Medical School that became known as Case Western Reserve University School of Medicine.  Wiggers achieved world recognition for developing a new method of registering heart and blood pressure, finding the effects of low oxygen pressure on circulation, discovering the effects of valve defects on the heart, studying the effects of shock, and his pioneering efforts along with Dr. Claude Beck and others in techniques of resuscitation from death in the operating room.  He is perhaps most famous for his authoring of the Wiggers diagram, a diagram commonly used in teaching of cardiovascular research.  After retiring as professor emeritus in 1953, Wiggers joined the Frank Bunts Institute of the Cleveland Clinic Foundation, taking part in postgraduate training for student doctors and in medical and scientific seminars.  Wiggers established and was the first editor of the medical journal Circulation Research and authored 7 books and over 300 articles.  In 1952 he received the Gold Heart Award from the American Heart Association.  In 1951 he was elected to the National Academy of Sciences.  In 1954 he received the Modern Medicine Award, and in 1955 the Albert Lasker Award for distinguished research in cardiovascular research.
  Title: Ernst Heinrich Friedrich Meyer
  Passage: Ernst Heinrich Friedrich Meyer (1 January 1791 Hanover, Brunswick-Lüneburg – 7 August 1858 Königsberg, East Prussia) was a German botanist and botanical historian.  Born in Hanover, he lectured in Göttingen and in 1826 became a professor of botany at the University of Königsberg, as well as Director of the Botanical Garden.  His botanical specialty was the Juncaceae, or family of rushes.  His major work was the four-volume "Geschichte der Botanik" (“History of Botany,” 1854–57).  His history covered ancient authorities such as Aristotle and Theophrastus, explored the beginnings of modern botany in the context of 15th- and 16th-century intellectual practice, and offered a wealth of biographical data on early modern botanists.  Julius von Sachs pronounced him “no great botanist” but admitted that he “possessed a clever and cultivated intellect.”
citations: Hermann Minkowski Minkowski diagram