This document traces the origins and evolution of early humans from primates to modern Homo sapiens. It discusses key early human species like Homo habilis, Homo erectus, and Neanderthals. Early humans originated in Africa around 5-6 million years ago and spread from there. Scientists learn about early humans through fossils and artifacts they leave behind. Artifacts are human-made objects while fossils are remains of living things. Languages may have developed as early as 2 million years ago in Homo habilis to support tool use and hunting. Cave paintings from 30,000-12,000 years ago provide evidence of early artistic expression and ritual among humans.