The moment of passing appears to bring an expression of relief to the deceased. But what is going on in our minds? In a new collaborative series with The Conversation, we answer that question. People often look like they are sleeping just after dying, having a neutral facial expression. But one of my relatives, who had intense pain the hours leading up to his death and lacked access to medical care, had a radiant, ecstatic expression. For decades, I have wondered whether the last minutes of life can be euphoric. Could dying perhaps trigger a flood of endorphins, in particular...