Here's a brain teaser (or brain-wrecker!) for everyone! Anyone who can answer this question with an accuracy of +-1 human deserves a Nobel prize in my books! I already know the answer. ;-)) Okay, we all know there are 6+ billion people on earth currently living at this moment. But how many people have lived AND died on earth in the past up to this moment? Ideally to answer this question we must have some criterias.. 1. A living human being is defined as an organic entity that has come out of a Vagina and still breathing. Or even a cizarian. Therefore those that died in the womb should not be factored into the equation. Half human-animal breed do not count, assuming some females have breeded with an animal in Earth's history. 2. How long ago were the first humans were actual humans? This is a difficult thing to classify because, are homo Sapiens really human? I think the best way is start at a point in time.. lets say EXACTLY 1 million years ago was when the first humans started being born. Anything before that is NOT considered a human being. So therefore we should work our answers from this point. 3. You have until exactly midnight this Friday12.00AM universal time to answer the question.. ie how many humans beings have lived up to this EXACT point in time.. Please tell us what formula you have used, as this is a tremendously challenging question, I know! Good luck!!