Our ancestors lived off the land and resources they knew how to work with. They ate animals, but rarely any plants. Different humans of the genus homo slowly progressed in changing their diets as they migrated around the world and adapted to resources. Due to adaptation of new environment, our ancestor's teeth evolved with it. Our ancestors also used tools, which lead us to know that they were mentally advanced and more human than anticipated. Our ancestors lived in grasslands or savannah areas and lived off what they could find. Sahelanthropus Tchadensis is a skull that is six – seven million years old, and possibly the oldest human ancestor found. The skull dates back to when humans and chimps separated from a common ancestor. The skull was named after the region of Chad where it was found. Also, another name for it is Toumai, its meaning being, "hope of life."
The fossil Tumai was found in Chad Africa, the fossil showed us signs of possible evolution of humans and chimps from a common ancestor. The skull found was the oldest ancestor evidence