There really should be a board where real physicist can answer questions from ignorant SciFi writers, but I couldn't find one. So here goes. Question 1: I asked author Greg Bear and a local community college physics instructor this question and I'm wondering if people on here will have the same debate or a definitive answer: While surfing the net I came across a page on tunneling that basically says: Say you are 16 years old and you want a nice new Porsche, but you can't afford it on your weekly allowance. Let's say your allowance is a crisp new $50 bill each week. You don't have the money but in quantum mechanics you could, by tunneling your money. Alright my question is: Will each $50 bill you tunnel be exactly the same, as in serial numbers, dates, and so on, or will each bill be different because they are coming from different places and times?