Professor Dawid Kielak is a Polish mathematician and Professor of Pure Mathematics at the Institute of Mathematics, University of Oxford. His research interests include geometric group theory and group ring theory (source: Wikipedia). Topics covered in the interview include time fibers, black holes, mathematics and the workings of the universe, higher dimensions and the outstanding scientific achievements of the Polish mathematician. We invite you to watch, Maciej Kawecki & Dawid Kielak | This is IT.