Nova: Science Now 2009 - Episode 1 - Diamond Factory

This episode of NOVA scienceNOW travels to a top-secret "diamond farm" to investigate breakthroughs in engineering artificial diamonds; looks at pitch correction software that turns sour notes sweet; highlights a technique that could use genetic "fingerprinting" to trace the microbial source of anything from food poisoning to deadly epidemics; and profiles Luis von Ahn, a Carnegie Mellon University professor and human computation expert.