ew Phys. 13.073020 (2011). 15. Frean. M.. Rainey. P. B. & Traulsen, A. The effect of population structure on the rate of evolution. Proc. R. Soc. B Blot. Sc,. 280. 20130211 (2013). 16. Komarova, N. L. Shahtiyari, L. & Wodarz, D. Complex role of space in the crossing of fitness valleys by asexual pop