Distance between the older and more massive clusters ϕ Lupus, η Lupus, and V1062 Sco and each of the younger clusters CrA Main, North, and Sco Sting over the past 18 Myr. Ages and their corresponding uncertainties for CrA Main, North, and Sco Sting are indicated with a star. Prior to star formation, the motion of these clusters corresponds to that of their primordial clouds. The ages of the reference clusters are indicated with the vertical dashed lines. All ages are taken from R23b and we list them in Table A.1. At the top, we show the distribution of the times of minimum separation; the distribution of Sco Sting is widespread and hardly visible.