Fossil bone from Koobi Fora, showing cut marks linked to butchering by early Homo. Credit: Sharon Kuo There is an old adage that goes, "you are what you eat," meaning that the food you consume helps build your body and fuel your mind. The same is true now as it ever was. When it comes to early humans, studying what they ate and how they obtained high-quality food, such as meat, can help us understand how their brains evolved and their social behaviors began to take shape. New research published in the Proceedings of the National Academy of Sciences reveals that our ancestors were not just lucky scavengers. They were also effective foragers who repeatedly processed, accessed, and shared animal resources across different environments. Researchers reached this conclusion after studying 1.6-million-year-old animal fossils from the Koobi Fora Formation , a fossil site in northern Kenya. The ancient humans living at this time were not just eating what they found.…