Our 5th Webinar was held June 2nd by zoom. It was hosted by Colorado school of Mines (Golden, United States of America). This Webinar was a course dedicated mainly to PhD students and early career professors about “U-Th-Pb dating of detrital zircons”. Number of participants was 58, 60% of them students from different countries (India, Morocco, Turkey, China; Spain, United States of America, Canada…)