Oliver Sacks travels once again in search of human diversity, to the South Pacific atoll of Pingelap, where he finds that a high proportion of the population is... » 

Oliver Sacks travels once again in search of human diversity, to the South Pacific atoll of Pingelap, where he finds that a high proportion of the population is colourblind and investigates the causes and effects of that condition. This book explores the islands, the people and their case studies. «