Speaking from your limited knowledge without the key which is Wisdom," this is just vanity that you know what you admitted that you don't know. Guessing what might be if we look back in a thousand years..well we do that now and through our learning of the past in it's actual form we are still amazed and ignorant of many of the history of the world and the creatures on <a href=""http://earth.how/"">Earth.How</a> can you from such a narrow band of learning say yes we now know in the last 50 years all the answers to the questions.I disagree with you guys and if you can open one door then you will have 2 more behind it.Its funny how in the mind we create with the ego that which the mind can not know but our imagination is busy making a theory so good ", it will be picked apart by others with just as much ego.Just say you don't know<br>!