Human evolution is the lengthy process of change by which people originated from apelike ancestors. This process involved a series of evolutionary adaptations that allowed early hominins to walk upright, develop larger brains, and create tools. Key species in this lineage include Australopithecus, Homo habilis, and Homo sapiens. The study of human evolution helps us understand our place in the natural world and the biological and cultural changes that have shaped humanity. Fossils, genetic evidence, and archaeological findings provide insights into how our ancestors lived, interacted, and evolved over millions of years.