How the Curie Point can suck the magnetism out of metal

Marie Curie is one of the most famous names in science. Pierre Curie has somewhat been eclipsed by her fame. His name lives on, though, in one particular physical property, in honor of his research into magnets. » 7/26/13 8:00am 7/26/13 8:00am

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