When scientists declared the Human Genome Project complete two decades ago, their announcement was a tad premature. A milestone achievement had certainly been reached, with researchers around the world gaining access to the DNA sequence of most protein-coding genes in the human genome. But even after 20 years of upgrades, eight percent of our genome still remained unsequenced and unstudied. Derided by some as "junk DNA" with no clear function, roughly 151 million base pairs of sequence data scattered throughout the genome were still a black box.
