Medicine Today

Many people take for granted that physicians know what they are doing, but every day scientists must make very difficult decisions. Just because scientists can harvest stem cells, doesn't mean that they should; and while one day nanotechnology might mean a little "nanobot" can be turned into a blood vessel to clean out the arteries, there are some ethical and environmental issues that must be considered first. Today people can be kept alive mechanically, but physicians must wrestle with how long