How do scientists diagram evolutionary relationships? Scientists represent evolutionary relationships with tree diagrams (also called cladograms) because new life forms appear the way new branches ...

Anonymous, "Tree of Consanguinity," Decretalium copiosum argumentum, ca. 1450-1510.(Detail). "A woodcut depicting the various ties between family members in the popular archetype of the tree of ...

When linguists talk about the historical relationship between languages, they use a tree metaphor. An ancient source (say, Indo-European) has various branches (e.g., Romance, Germanic), which ...