Nico Stransky was getting frustrated. A computational biologist working in the Broad’s Cancer Program, Nico was trying to see patterns in the data from the recently sequenced genomes of 70 tumor samples from patients with head and neck cancer. In the study, scientists sequenced the exomes, or protein-coding, portions of the tumor genomes and analyzed the data to reveal mutations in a variety of forms that disrupt the “spelling” of genes in different ways. But the tables of mutation statistics that Nico was looking at could not tell him the full story.