What's the furthest back we can prove human existence? Is there good reason to believe it goes further then this point?

The fur the st back we can prove human existence is to the Hom o hab ilis species , which lived approximately 2 . 8 million years ago . However , there is evidence to suggest that humans may have existed even further back in time , such as the discovery of Hom o ere ct us foss ils in Africa , which date back to around 1 . 9 million years ago . \n \n As for whether there is good reason to believe that human existence goes further back in time , it is difficult to say for certain . However , with ongoing discover ies in pale ont ology and gen etics , it is possible that we may un cover more evidence of human ancestors in the future . It is important to approach these discover ies with respect and care , and to avoid making assumptions or drawing conclusions based on limited evidence . </s>