"So all signs point to the boson being the carrier of some new, fifth force. But physics isn't keen on celebrating prematurely. Finding a new particle is always big news in physics, and warrants a lot of scrutiny. Not to mention repeated experiment."

Everything in our Universe is held together or pushed apart by four fundamental forces: gravity, electromagnetism, and two nuclear interactions. Physicists now think they've spotted the actions of a fifth physical force emerging from a helium atom.