Final answer:
The most complete early primate fossil found is Sahelanthropus tchadensis, which lived approximately 7 million years ago. It is claimed to be the last common ancestor of humans and chimpanzees.
Step-by-step explanation:
The most complete early primate fossil found is Sahelanthropus tchadensis. It was discovered in Chad and lived approximately 7 million years ago. This fossil is significant because it is claimed by some researchers to be the last common ancestor of humans and chimpanzees, living right at the time of their divergence.