Bayesian inference of phylogeny combines the information in the prior and in the data likelihood to create the so-called posterior probability of trees, which is the probability that the tree is correct given the data, the prior and the likelihood model. Bayesian inference was introduced into molecular phylogenetics in the 1990s by three independent groups: Bruce Rannala and Ziheng Yang in Berkeley,[1][2] Bob Mau in Madison,[3] and Shuying Li in University of Iowa,[4] the last two being PhD students at the time. The approach has become very popular since the release of the MrBayes software in 2001,[5] and is now one of the most popular methods in molecular phylogenetics.