What if we have been getting death wrong? For decades, modern medicine has relied on the concept of brain death, the idea that when the brain irreversibly stops functioning, the person has died. But what if that is not true?

In this episode, I sit down with Dr. Paul Byrne, neonatologist, Clinical Professor of Pediatrics, past president of the Catholic Medical Association, and one of the leading critics of brain death, for a conversation that challenges one of the most fundamental assumptions in modern medicine.

Early in his career, Dr. Byrne encountered a patient labeled “consistent with cerebral death.” He continued treatment. That patient went on to live, marry, and have children.

Since then, Dr. Byrne has spent over 40 years arguing that what we call brain death may not be death at all.

So what is death? And what happen ...