Btw. Cool story today: https://blogs.scientificamerican.com/observations/a-potentially-game-changing-message-from-the-dawn-of-time/
Really shines light on some dark matter.
tl;dr version: astronomers have imaged early universe. Than it itself is interesting, but the real surprise is that the early universe appears cooler (i.e. less hot) than expected with a possible implication being dark matter, under special circumstances, can interact with the electromagnetic force. Dark matter is normally thought of as matter that interacts gravitationally, not electromagnetically, which is why this story might be kind of a big deal.
Edit: Correction, the story claims dark matter interacts non-gravitationally, not necessarily electromagnetically. I.e. strong/weak nuclear interactions might be the appropriate force.