There is a ridiculous amount of dogma in this thread.
Robbie G; all that Carzy is saying is that there is not enough evidence either way to suggest the existence or non-existence of life-after-death. As somebody has already pointed out, your being so adamant that there is no life-after-death is bordering on religious fervour - as much, in fact, as the religious posts in this thread.
You are basing your "reasoning" on two things; physics and human logic. Both of these facets of thought are as self-contained and circular as the Bible and religious belief, and are in no position to provide evidence either way in an argument about religion.
You also criticise Carzy (Crazy, ho ho ho) for not having made up his mind. Again, I fail to see the problem with this, it implies that he is working through the problem in his own way and his own mind. You, on the other hand, seem to have taken on the Dawkinsian dogma of today, that religion is idiocy, and that anyone who so much as hints at believing must be a tool as well.
(Before we go down this avenue I am agnostic; I believe that there is no possible way to prove or disprove God's existence).
The point about "100 years ago" is this: many of you are appealing to common sense to disprove God. In this regard, though, common sense is nothing more than the belief of the masses. 100 years ago (we can bring this back further if we need to, the actual date is irrelevant to the point), religious belief was still the majority, "common sense" view. As common sense is nothing more than the dogma of the present, it is not a valid argument for the existence of an eternal, such as God.
The only point that I've seen against this is that "100 years ago people were stupid". I think the simplest way to contradict this is through naming some of the greatest visionaries our world has ever seen, whether religious or not:
Einstein, Hume, Kant, Descartes, Aristotle, Plato, Socrates, Curie, Mendeleev, Locke, Darwin, Newton, Gallileo, Edison are just a few people that existed 100 years ago or earlier, and certainly can't be considered stupid. Common sense is not a reasonable or valid answer to the question of God's existence, or the existence of life-after-death.