In the first half of May 2025, Gr@v hosted many wonderful collegues, including Isabel Cordero (U. Valencia, Spain),
Francesco di Filippo (U. Frankfurt, Alemanha), Alberto Duran Cabaces (Universidade de Valladolid, Spain), Kunihito Uzawa (Japan), Gaël Servignat (Meudon), Galin Gyulchev (U. Sofia, Bulgaria) and William Cook (Jena, Germany). Thank you all for the visit and the science sharing!