I guess what I am driving at is I think the technology is already there, or something new could be invented using nanotechnology or whatever. I mean, I saw an X-Ray picture of a bird in national geographic that showed lead that somehow got in it. X-Rays show heavy metals.

Are there not any brainy people out there yet who have figured out what such a imaging device would be worth? Billions - if it could give an accurate picture of what is inside us. And show us when the mercury is gone.

For now, though, we do have blood and hair tracking which Huggins and Cutler recommend. But that is less convincing, no? Maybe we should encourage universities to start testing what might work?