Dr Alice Roberts examines the journey of mankind's ancestors from Africa to Europe, how **** sapiens managed to survive the harsh ice age conditions and their relationship with the native inhabitants of the continent - the Neanderthals, who had bigger brains and were better adapted to the cold. She explores the theory that competition between the two species led to the extinction of the former and the factors that governed subsequent changes in skin colour Read more at http://www.tvguide.co.uk/detail/1230165/122068464/the-incredible-human-journey#zoD02PT3cLPobUqb.99