It's been years since Neatorama posted the terrifying tale of the Demon Core. In case you missed it, or don't recall all the details, it's an important story about the steep learning curve involved in early nuclear research. Scientists associated with the Manhattan Project knew there was danger in the radioactive materials they were working with, but had yet to codify safety standards into failsafe procedures, which spelled tragedy for two young physicists. Plainly Difficult brings us a video version of the story. This video contains a couple of images that may be disturbing.