Chad has a long and wealthy records. A humanoid cranium found in Borkou is more than three million years old. Because in ancient instances the Saharan location become not completely arid, Chad 's populace becomes more lightly disbursed than it 's far today. For instance, 7,000 years ago, the north relevant basin, now in the Sahara, become nevertheless filled with water, and people lived and farmed around its shores. The cliff artwork in Borkou and Ennedi depict elephants, rhinoceroses, giraffes,