Is it useful to think about the difference between ‘physically possible’ i.e. obeying the laws of physics and possible to engineer? In computer science there is something like this. You have things which can’t be done on a turing machine (e.g. halting problem). But then you have things which we may never be able to arrange the atoms in the universe to do, such as large cases of NP-hard problems.
So what about in physics? I have seen the argument that if we set loose a paperclip maximizer on earth, then we might doom the rest of the observable universe. But maybe there is simply no sequence of steps that even a super brilliant AI could take to arrange matter in such a way as to say move 1000kg at 98% the speed of light. Anyway, I am curious if this kind of thinking is developed somewhere.
Is there any good nonfiction books on cryonics? All I could find is this one http://www.amazon.com/Freezing-People-Not-Easy-Adventures/dp/0762792957/ref=sr_1_1?ie=UTF8&qid=1441303378&sr=8-1&keywords=cryonics . I started to read it but it is more historical and autobiographical. Also, do you think there would be demand for a well researched book on cryonics for general audiences?