Cosmic shoreline plot of exoplanets previously observed at 15 μm using MIRI alongside the remaining DDT targets (T. P. Greene et al. 2023; S. Zieba et al. 2023; N. H. Allen et al. 2025; P. C. August et al. 2025a; M. Fortune et al. 2025; E. A. M. Valdés et al. 2025; M. Holmberg et al. 2026). The cosmic shoreline is shown as the line ﹩I\propto {v}_{{\rm{esc}}}^{4}﹩ such that it intersects the I_XUV and v_esc for Mars using Equation (27) in K. J. Zahnle & D. C. Catling (2017). Data used to generate this figure are from C. Cadieux et al. (2024), K. G. Stassun et al. (2019), A. Castro-González et al. (2023), D. Oddo et al. (2023), E. K. Pass et al. (2023), J. G. Winters et al. (2022), C. Beard et al. (2022), G. Lacedelli et al. (2024), E. Agol et al. (2021), A. Bonfanti et al. (2024), M. G. Soto et al. (2021), E. A. Meier Valdés et al. (2025), R. Luque et al. (2022), M. R. Zapatero Osorio et al. (2026), and J. Kemmer et al. (2020).