Yes, I caught that, too. I just chalked it up to the average non-technical journalist, considering where this article was published. Joe Gray W5JG On Tue, Mar 13, 2012 at 5:27 PM, Michael Costolo <michael.costolo at gmail.com> wrote: > I'll admit to being a bit rusty in my particle physics, but since when do neutrons orbit the nucleus? > > -Mike-