PhysicsThe wonder particle: How axions could solve more than just dark matter Physicists are coming to realise that hypothetical particles called axions could explain not only dark matter, but dark energy too, and more besides. Now there is fresh impetus to detect them Features
PhysicsThe hunt for dark matter: The universe's mysterious gravitational glue In pursuit of dark matter, researchers are doing everything from burying vats of xenon deep underground to sending a balloon floating above the Antarctic. When will their creativity pay off? Features