First of all, "possible atheistically" is essentially show me the proof and I'll believe. I was in a coma for 4 days in 1971. Nada, squat, no afterlife shit, nothing. The problem is that all so-called "afterlife" evidences are either a load of BS or some type of brain chemical reaction we (as yet) don't understand.
I have an open mind, so show me some substantial, quantifiable, repeatable science, I'll believe.