The evolution of Red Supergiants at very low metallicity J. H. Groh, G. Meynet, S. Ekström, P. Eggenberger, C. Georgy, A. Granada and S. Heap EAS Publications Series, 60 (2013) 51-55 Published online: 23 May 2013 DOI: 10.1051/eas/1360005