Grow your own meat
There was an interesting article on Slashdot the other day, about the feasibility of growing meat, in the same way as you would grow a plant . Basically, they talk about replicating a single cell many times, to grow a huge thin sheet of animal tissue (which is all meat really is!) which could then be folded or processed into chicken nuggets, meat patties or (reading between the lines) other dishes where neither shape nor colour is particularly important. Of course, it sounds like there are plenty of problems to sort out, like getting the right amount of fat and other flavourings. But you can also reduce the amount of fatty acids, for instance - making the meat more healthy!
If successful, it raises some interesting ethical questions related to vegetarianism. If no animals were harmed (let’s assume that the inital donor wasn’t killed in the process, which may well be true), then is it okay for vegetarians to eat it, even if it’s technically flesh? Other arguments include health and the environment, but what if you can remove the fatty acids, and what if growing meat isn’t (energetically speaking) significantly worse than making bread or other manafactured foods?
Like the scientists growing a brain in a petri dish, it raises some interesting ethical questions that will have to be answered sooner or later.