A rare desert cactus, the Hoodia, contains a never before discovered molecule that may hold the answer to one of the world's greatest health problems, obesity and over-eating.  Scientists have isolated an appetite suppressant in the flesh of the plant that is powerful enough to stop people eating all day.  But who holds the rights to this information?  The San Bushmen of the Kalahari desert have known of its powers for decades.  This film reveals how, thanks to a rare spirit of co-operation between first world and third, one of the poorest tribes on earth stands a good chance of becoming overnight millionaires, if the drug is approved. 

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Spotlight is a weekly series of investigative reports from around the world, introduced by author and Journalist Mark Hertsgaard.  Mr. Hertsgaard�s latest book is �The Eagle's Shadow: Why America Fascinates and Infuriates the World."