I don't know if there is a heaven or hell. The truth is science can not prove or disprove it. Believing in heaven or hell requires faith. To be honest, sometimes my faith is not as strong as I wish it was and I hope that I don't go to hell. The bible says just being a nice person does not get you into heaven.

If there is no heaven or hell I'm guessing that death is like before we were born. Billions of years went by before any of us here were born and we were not aware of time.