Sequencing the genome has brought us unprecedented knowledge. We've identified genes that cause debilitating conditions. We can understand genetic mechanisms behind cancer and heart disease. The technologies that allow us to sequence genes also allow us to match DNA samples in criminal cases and paternity suits - and to know if a child will be born with Tay-Sachs or sickle-cell anemia. Anthropologists have a new tool for tracing the ancient migrations of people around the globe, and by comparing our DNA to the DNA of mice, worms, and plants; we've been able to quantify the interrelatedness of all life on the planet. In March 2000, President Clinton announced that the genome sequence could not be patented, and should be made freely available to all researchers.