165 years ago Andrija Mohorovicic was born in Volosko in Croatia; he proved the existence of the MOHO discontinuity, presented here by Professor Marijan Herak and Faculty of Science, University of Zagreb: http://www.gfz.hr/sobe-en/discontinuity.htm
More: https://www.britannica.com/biography/Andrija-Mohorovicic