Spencer Wells investigates the first waves of human migration, out of Africa towards Asia, and tracks the DNA "markers" that tell the story of this journey.
In the second part of the series, Spencer Wells focuses on the human settlement of Europe, and North America.
Where did we all come from? Could we all be descendants of Adam? And if he existed, who was he, where did he live and what did he look like? It is a mystery that intrigues us all and questions like these have been asked time and time again, but nobody has got close to the answer - until now. Spencer Wells, a leading geneticist and National Geographic explorer-in-residence, is setting out on a quest to discover if there was an "Adam" from whom all humans are descended.