In the first episode, Roberts introduces the idea that genetic analysis suggests that all modern humans are descended from Africans.
Dr. Alice Roberts travels to Northern Siberia to learn how hunter-gatherers survived there.
Looking at how our species coped with the rival Neanderthals and the Ice Age.
Dr. Alice Roberts looks at our ancestors' seemingly impossible journey to Australia.
Dr. Alice Roberts investigates the possible routes taken by humans to reach the Americas.