Cormac Harris and Alan O'Sullivan from Coláiste Choilm in Ballincollig won the BT Young Scientist Award in 2020 with their project on gender stereotyping.
They went on to represent Ireland at the EUCYS this year, coming out on top against students from 39 other countries.
The winner of BT Young Scientist 2021 was also competing in Europe - Gregory Tar took home third prize for his project on deep fake videos.
