Summary
Highlights
Humanity's evolution began approximately seven million years ago, separating our lineage from chimpanzees. Over 20 early human species, or hominins, emerged, with some becoming extinct and others being potential ancestors to modern humans. These species displayed varying human-like traits, such as large brains, small teeth, bipedality, and tool use.
Hominins are categorized into three main groups: early hominins, australopithecines, and the genus Homo. Early hominins, living 7 to 4.4 million years ago in Africa, shared many ape-like traits but also showed early human characteristics like small canines used for eating.
The next evolutionary phase involved australopithecines, who lived between 4.4 and 1.4 million years ago across Africa. While still possessing some ape-like traits, changes in their skull, spine, and legs indicate a significant shift towards consistent bipedal locomotion, a distinctly human-like characteristic.
The third and current phase involves the genus Homo, with the earliest species dating back more than two million years. Unlike earlier hominins, Homo species became distinctly more human, exhibiting larger cranial capacities, developing sophisticated stone tools, and being the first to control fire.
These physical and behavioral adaptations, along with technological advancements, enabled some Homo species to be the first to migrate out of Africa and explore other parts of the world. Of the over 20 hominin species that have existed, only Homo sapiens remain, having been shaped by millions of years of evolution to undertake journeys of exploration and industry.