New study suggests that our ancestor Lucy, an Australopithecus afarensis, may have used tools over 3 million years ago. Researchers analyzed hand bones and found evidence of human-like grasping patterns in three australopithecine species, including A. afarensis. This finding provides further evidence that tool use began before the emergence of the Homo genus.

Source: https://www.livescience.com/archaeology/our-ancestor-lucy-may-have-used-tools-more-than-3-million-years-ago