SPEAKER: B. Lanzoni TITLE: Probing the dynamical evolution of stellar aggregates with Blue Straggler Stars - Part 1 ABSTRACT: Globular Clusters (GCs) provide the largest collection of coeval stellar systems at different stages of dynamical evolution. Blue Straggler Stars (BSS) are the most massive objects luminous enough to be measured in a GC and they are thought to form through binary evolution and stellar collisions. Hence, they represent the ideal test-particles to probe the internal dynamical evolution of stellar aggregates. In the framework of COSMIC-LAB (a project devoted to unveil the complex interplay between dynamics and stellar evolution), we will discuss how the shape of the BSS radial distribution records the degree of dynamical evolution experienced to date by the parent cluster, indicating how efficient dynamical friction has been to date.