The operating room has long been defined by its hush-hush nature because surgeons are notoriously bad at acknowledging their own mistakes. These mistakes kill some 22,000 Americans each year. Many of the errors happen on the operating table, from leaving surgical sponges inside patients' bodies to performing the wrong procedure altogether. Now, Teodor Grantcharov, a surgeon and professor of surgery at Stanford, believes he's created the technology to create and analyze recordings of operations to help improve safety and surgical efficiency. It's the operating room equivalent of an airplane's black box: recording everything in the operating room via panoramic cameras, microphones, and anesthesia monitors before using artificial intelligence to help surgeons make sense of the data.