The term "pre-human" refers to an era before the existence of Homo sapiens or modern humans. Some synonyms for this phrase include "prehistoric," "proto-human," "early man," or "ancestral human." These terms are used to describe the species or groups of organisms that existed before the advent of humans. Pre-human species include Australopithecus and Homo erectus, who lived in Africa millions of years ago. The study of pre-human species is crucial to understanding human evolution and the development of our species. Scientists use various methods to study pre-human fossils and artifacts to unravel the mysteries of our ancient past.