%0 Journal Article %T The Changing Geometry of a Fitness Landscape Along an Adaptive Walk %A Devin Greene %A Kristina Crona %J Quantitative Biology %D 2013 %I arXiv %R 10.1371/journal.pcbi.1003520 %X It has recently been noted that the relative prevalence of the various kinds of epistasis varies along an adaptive walk. This has been explained as a result of mean regression in NK model fitness landscapes. Here we show that this phenomenon occurs quite generally in fitness landscapes. We propose a simple and general explanation for this phenomemon, confirming the role of mean regression. We provide support for this explanation with simulations, and discuss the empirical relevance of our findings. %U http://arxiv.org/abs/1307.1918v3