Scientists find radioactive fracking waste in Pennsylvanian stream

A group of Duke University scientists have found concentrations of radium, a highly radioactive substance, in a stream near a facility that treats wastewater left over from hydraulic fracturing. The concentrations are 200 times higher than background levels — and they're in the water supply. » 10/03/13 2:43pm 10/03/13 2:43pm

What makes polonium the ideal poison for assassins?

As poisons go, polonium-210 is a bit of a mixed bag. Is it effective? Absolutely. If you eat a piece of polonium-210 the size of a grain of salt, it'll probably be enough to kill the average adult. That said, the highly unstable element is notorious for leaving an unmistakable calling card: ridiculously high levels of… » 7/06/12 11:40am 7/06/12 11:40am