What Happens When We Die? - TIME
Because we're pushing through the boundaries of science, working against assumptions and perceptions that have been fixed. A lot of people hold this idea that well, when you die you die, that's it. Death is a moment, you know you're either dead or you're alive. All these things are not scientifically valid but they're social perceptions.
However, ultimately what matters is, What's going on to a person's mind? What happens to the human mind and consciousness during death? Does that cease immediately as soon as the heart stops? Does it cease activity within the first 2 seconds, the first 2 minutes? Because we know that cells are continuously changing at that time. Does it stop after ten minutes, after half an hour, after an hour? And at this point we don't know.
I was really into this type of question during college.