Is death the end of the road or the beginning of a new life?

Some people believe in the soul, reincarnation, and so on. Others don't. I belong to the group that doesn't believe, but I'm closer to the middle (uncertainty). I don't dismiss claims (that I can't explain myself or that someone else makes) as untrue. However, I've often come across mentions of the following observation: during death, dying people were weighed, and it turned out that the body was 21 grams lighter after death than before, and this doesn't even depend on the person's weight. But, of course, I would like death not to be the end.