Potentiometer, an electrical device that measures potential difference between two points in a circuit by comparison with a standard battery of known potential difference. The name is also applied to a variable resistor that provides varying amounts of potential difference.
We're all exposed to tiny levels of radiation, but a blast of it can leave you in agony -- that is, if it doesn't kill you outright. What is it, what causes it and how can we treat it?
Imagine walking through a field and stumbling upon scads of corpses, all in various states of decomposition. It's not the setting for your next nightmare, but rather a very real discipline of forensic anthropology.