+Common descent is the scientific theory that all life on Earth shares a single universal [common ancestor](/wiki/common_ancestor). This principle of [evolution](/wiki/evolution) beautifully illustrates how diverse species have branched from a shared lineage over vast spans of time, forming an interconnected tree of life.
+## See also
+- [Natural Selection](/wiki/natural_selection)
+- [Speciation](/wiki/speciation)
+- [Phylogeny](/wiki/phylogeny)