A Fifth Force...X17

Until today I had not known that for the last few years there was some margin science suggesting a specific new "force carrier"... a "Fifth Force", so to speak. It has been proposed by some apparently credible Hungarian physicist. Way too complicated to spend time understanding, it shows up in sub-particle hits as light being emitted when it shouldn't. The x17 references the energy magnitude. Presumably this may have something to do with "dark matter". Hope for Deep Substance Before the Meteor.