www.youtube.com/watch [Light as a Metaphor in Philosophy, Studium Generale lecture, University of Heidelberg, 4 December 2014]
www.youtube.com/watch?v=tQqOVywss5I [‘If nobody asks me about it, I know it.’ – The Reality of Time, HamburgAcademy of Sciences, Academy Lecture, 26 November 2015]
