As DNA sequencing gets faster and cheaper, clinicians are clamouring to use it. A test for malfunctioning genes might show how to treat a tumour or help to diagnose the underlying causes of a disease. But sequencing data are too complex for most clinicians to analyse, and medical institutions are wary of transferring patient data to specialists elsewhere for analysis. A genome-interpretation company is now offering its solution: a 1-metre-tall, 275-kilogram black box that carries enough storage...