Hyperbaric chambers were once the leading treatments for deferring dementia decades ago. Though their usage for preventing or delaying dementia eventually faded out since due to weak evidence, the practice is being resurrected for similar reasons. This article reports the details a small experiment showing that hyperbaric oxygen therapy indeed increases telomere length, which has been associated with people who live longer lives. But, as Dr Leonard Hayflick points out to Jack Russo, maintaining a constant telomere length is also a property of cancer cells. Could there be a major revelation hiding this paper or is it just another weak idea destined to go as quickly as it came?