Explore the evidence for evolution through phylogenetics with this lesson plan from NOVA's Evolution Lab. First, students consider and discuss how we understand and organize the biodiversity that exists on Earth. Students are then introduced to phylogenetic trees and practice building them with the Build a Tree interactive. In Build a Tree, students use both morphology and DNA analysis to identify relationships between species. Next, students explore speciation and shared ancestry with the Deep Tree interactive. As an interactive tree of life, Deep Tree helps students understand evolutionary history on Earth. Discussion questions and video quizzes allow educators to assess student understanding.