This essay was inspired by the preparations to the exhibition ‘Der Ball ist rund – Kreis Kugel Kosmos’ which was held at the Pergamonmuseum Berlin during the Football World Championship 2006 in Germany. I thank my family, the group Vergleichende Zoologie at the Humboldt-Universität zu Berlin, and Martina Minas-Nerpel for inspiring discussions and Frederick Schram and the reviewers of the journal for helpful comments on the manuscript. Thanks are due to Roy Caldwell who provided the photograph of Nannosquilla. Peter Lederer’s photography of a scarab beetle is gratefully acknowledged.
Received: 8 July 2008
Accepted: 29 September 2008
Published online: 3 November 2008