How did they get to all corners of the world? Armed with the latest scientific research, Dr. Alice Roberts retraced the glorious path of our great ancestors. Thousands of years ago, a branch of our ancestors, Homo sapiens, left the African continent and ventured into unknown territories. Their descendants crossed vast, scorching deserts, dense, humid rainforests, barren tundras, and braved treacherous seas at all costs, ultimately creating brilliant ancient human civilizations. In just 6,000 years, their footprints had spread across the globe... How did they achieve this? And we, as their descendants, why are we so morphologically diverse? What does it mean for us as the sole surviving branch of the human race? By gathering evidence from genetics, fossils, archaeology, meteorology, and more, Dr. Alice Roberts uncovered five epic routes that our ancestors took to spread across the world and the various challenges they faced along the way. This will reveal how this branch of humanity grew and spread throughout the globe, eventually creating such a colorful and vibrant world. Despite our many differences, Alice also shows us how surprisingly similar we are.