A South-North-South Circular Programme for Sustainable Development. UNESCO-TWAS, in collaboration with the Lincei Academy and the International School for Advanced Studies (SISSA), offers young scientists from Least Developed Countries the opportunity to visit either research laboratories at Centres of Excellence in Trieste or Udine, Italy. For details, see the application form. Research proposals must fall under the umbrella of sustainability science and thus be relevant to areas that support the United Nations Sustainable Development Goals (SDGs).