As a part of a special issue of the university journal Forum dedicated to 670^th anniversary of Charles University foundation, Jakub Trubač, EGG-member and head of Stable and Radiogenic Isotope Laboratory, was interviewed as a representative of Faculty of Science. He starts with the citation of one of his teachers, Dr. Fratišek V. Holub, who said: “Rocks are the only solid basis of our world”:-) Enjoy the interview on pages 52-53 of the electronic document (link).