Gunter Königsman
gunterkoenigsmann
The author of "Physik - Dein anderes Physikbuch", "Die Relativitätstheorie für Neugierige", "Wiese - ein *langes* Leporello" and "Finanzmärchen".
Langensendelbach, Germany
Chris Sangwin
sangwinc
Professor in the School of Mathematics at the University of Edinburgh.
University of Edinburgh Edinburgh, UK