Souls

In a discussion with some guys at work today, we happened to talk about how there was a guy who once experimented to try to measure the weight of a soul.  That guy's hypothesis was that the soul actually did have mass.  I don't know why exactly I think this, but I would hypothesize that the soul does not have mass, although I'm not sure I have any verses or other reasons to think that.  Dad, maybe you'd want to install a special bed in the Good Sam's dying room to measure if their weight changes by a couple grams when people die?  The tricky part would be defining exactly when the soul leaves the body.  While I don't know about the weight of a soul, I do know its worth:  priceless.  And that's way more important than its weight.