Inside Google DeepMind's unraveling: low morale and missed deadlines

Google DeepMind cofounder Demis Hassabis is stepping down as CEO and moving to a chairman role. But the shock reshuffle was just the tip of the iceberg of what has been a difficult year for Google DeepMind. Fortune’s Beatrice Nolan explains how stalled models, missed deadlines, and staff burnout led to the unraveling of the AI research lab.