Extreme hydrodynamic losses of Earth-like atmospheres in the habitable zones of very active starsC. P. Johnstone, M. L. Khodachenko, T. Lüftinger, K. G. Kislyakova, H. Lammer and M. GüdelA&A, 624 (2019) L10DOI: https://doi.org/10.1051/0004-6361/201935279