SCIENCE Space Tamil on Instagram: "TICKLING THE DRAGON'S TAIL This is the story of the Demon Core, a 6.2-kilogram sphere of plutonium that killed two scientists at Los Alamos. THE EXPERIMENT: Scientists wanted to know how close the core could get to going "critical" (starting a nuclear chain reaction) without actually detonating. They did this by surrounding it with neutron reflectors. THE DANGER: Physicist Louis Slotin was famous for his reckless method. He would lower a beryllium shell over th