Matthias RangMatthias Rang studied physics in Freiburg, Germany and Berlin before becoming a visiting researcher in the field of nano-optics at the University of Washington, Seattle, USA. He received a PhD from the University of Wuppertal, Germany and carries ou research on Goethe's theory of colour in relation to physical optics at the Goetheanum, Switzerland, where he currently co-leads the Natural Science Section. Read More Read Less