India achieved its best-ever tally at the 19th International Earth Science Olympiad (IESO) 2026, hosted by Italy, by securing nine medals. The Indian student team brought home 4 gold, 3 silver and 2 bronze medals. Participants from 39 countries competed in the event. The IESO is an international competition for secondary school students that tests knowledge of earth sciences, including geology, meteorology, oceanography and astronomy-related topics.