Homo habilis: Homo habilis was an early human species that lived in Africa between 2.4 and 1.4 million years ago. It is considered the first member of the Homo genus and was characterized by a larger brain and more advanced tool-making abilities compared to earlier hominins.
Homo erectus: Homo erectus was a human species that lived in Africa, Asia, and Europe between 1.9 million and 143,000 years ago. It is considered a more advanced and widespread species than Homo ergaster, with further developments in tool-making, brain size, and physical characteristics.
Acheulean tools: Acheulean tools were a type of stone tool technology developed by Homo ergaster and Homo erectus, characterized by large, tear-shaped hand axes and other tools used for cutting, scraping, and other tasks.