De Grey is an English author and theoretician in the field of gerontology, and the Chief Science Officer of the SENS Foundation. He is editor-in-chief of the academic journal Rejuvenation Research, author of The Mitochondrial Free Radical Theory of Aging and co-author of Ending Aging. Wikipedia. Due to technical difficulties, the voice of the interviewer echoes at the beginning. However, De Grey's voice comes out clearly and he offers excellent insight into what he believes will lead to the best advances for cancer treatment in the future.