Evolution of digital organisms at high mutation rate leads to survival of the flattest Nature 412, 331-333 (19 July 2001) Claus O. Wilke, Jia Lan Wang, Charles Ofria, Richard E. Lenski, and Christoph Adami The abstract of this article. Two movies, one (movie0.5.mpg [6.9Mb]) showing a fit organism (yellow-green) outcompeting a flat one (blue-purple) at a mutation rate of 0.5, and one (movie1.5.mpg [7.1Mb]) showing the same pair of organisms at a mutation rate of 1.5, where the flat organism outcompetes the fit one. The Avida source code (version 1.4) used in these experiments. All experiments were performed under Redhat Linux (version 6.2), on the Beowulf cluster in the Center for Biological Modeling at the Michigan State University. The latest version of the Avida software. Configuration and executable files used to perform the experiments. The 12 pairs of organisms with replication rate ratio > 1.5. The final results from the competition experiments, and the fitness decay functions for the 12 organism pairs. Parameters a and b for the fitness decay functions, and predicted and measured critical mutation rates. Correspondence should be addressed to Claus O. Wilke (e-mail: wilke@caltech.edu.)