The iEvoBio 2012 Challenge has been announced, and the topic is synthesizing phylogenies. The task: The rules of this challenge are: The set of trees you use must have at least 10,000 leaves in total. Acceptable entries could be a set comprising 2,500 distinct trees covering the same four taxa, a single tree with 10,000+ leaves, or anything in between. Your results must be scientifically new.