Diamonds have untapped capabilities that can be extremely useful in the advancement of science and technology. From PBS NATURE's "Diamonds". The program examines the oldest, hardest natural substance in the world - diamonds -- from their beginnings in the core of the earth, through mining and acquisition, to the history of the most famous of these extraordinary gems. Actress Stockard Channing narrates the program. For more information, visit http:/www.pbs.org/nature