RETORNA proposes breakthrough research, distributed in 10 individual projects, performed by 10 Doctoral candidates in the following countries: Ireland, Spain, Netherlands, Türkiye, Germany, and Italy. DC4 and DC8 will be hired by UNIVERSIDAD DE ALICANTE (UA) and work mainly in the lab in Alicante, with various secondments in the RETORNA consortium. 2 Doctoral Candidate positions (DC4 and DC8) at UNIVERSIDAD DE ALICANTE (UA) are available in the framework of the