The longest amount of time we can currently prove human existence using fossil evidence is around 300,000 years ago, with the discovery of early Homo sapiens fossils in Morocco. However, if we consider the broader category of hominins, which includes modern humans and their extinct ancestors, the timeline extends much further back.

According to fossil evidence, the first early hominins appeared on Earth around 7 million years ago. These early hominins, such as Sahelanthropus tchadensis, were not fully human-like or bipedal, but they represent crucial stages in the evolution of our species. As new evidence and discoveries are made, our understanding of human evolution and the timeline of our species' development will continue to evolve.
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