So here I now sit, on what apparently is Science Friday, the eve of Midsummer, wondering whether the digging for WIMPs and the probing for Axions is really going to lead to anything meaningful, querying if the clues aren't being waved bravely in front of our noses where we're very much not looking. For if there's any particle in the Universe that diligently respects every quantum principle going, and conforms to every single one of the laws nobody is ever expected to understand, that particle is the Electron. Most minute of particles, most undeterminable, most widely talked-about and yet not even in the line-up of suspects for Dark Matter, there it sits, negatively charged, the particle that makes our Universe everything we perceive. We like to think all electrons are the same. But then, we made that mistake with snowflakes for a very long time indeed. The electron dances along with the Photon (a 'shadow version' of which was a casual DM suspect at Invisibles), which lets us see the everything we perceive, for without the Photon, of course, there would only be Darkness, and that would never do.
Someone else can do the math. There are as usual more stories behind the pictures.