IESO was first held in 2003 by a group of Korean Earth Scientists. The IESO is an annual competition for secondary school students not older than 18 years on 1st July of the year of the Olympiad. The theoretical examination includes problems which are supposed to measure the participant's knowledge and understanding of Earth science areas. International Earth Science … [Read more...] about International Earth Science Olympiad(IESO) 2019 | About, Application Procedure, Levels and Examination Pattern