This activity concerns the evolution of three species of lizards on the Canary Islands. Its purpose is to demonstrate to students that evolutionary problems are complex and solutions may involve data from various disciplines of science. First, students must arrive at different phylogenetic solutions using only geographical and geological data. Then they compare the morphology of the species involved, arriving at a more traditional solution to phylogeny. Finally students deduce a phylogeny based on genetic distance using DNA sequences from cutting edge biotechnology. The strength of the activity is its depth and interdisciplinary approach. This activity reinforces the interdisciplinary nature of modern science. Students utilize real data from real scientists. They apply the principles of evolution in their reasoning to make use of this data from geology and biological science.