Scientists are making new discoveries about human ancestors, with some findings suggesting that early humans used successful strategies for gathering meat as far back as 1.6 million years ago. However, the timeline of human evolution is still unclear, with some reports suggesting that certain ancestors may not be direct relatives and others proposing that dogs became domesticated earlier than previously thought. The study of fossils, including chipped teeth and reconstructed skulls, is providing new clues about human history, but the exact details and timeline are still being debated.