The blue fog

New research has shed light on a long-standing mystery that has perplexed physicists and chemists for over a century. Solving the secret of the “blue fog” proved to be an intellectual tour de force – and one that could lead to new types of display devices. Find out more by reading this feature article from the April issue of Physics World, written by Oliver Henrich and Davide Marenduzzo, who were involved in the latest work.