Scientists have finally discovered dark matter? – video

For decades, physicists have puzzled over the mystery of dark matter. We think it makes up 85% of the matter in the universe, but the mysterious substance cannot be seen or detected and we know about it mainly through observations of the gravitational effect it has on other objects. But now scientists believe they may be one step closer to finding it. Science editor Ian Sample explains to Madeleine Finley why, if confirmed, the discovery could completely change our understanding of the universe. And Dr Samuel Erickson, senior research fellow at the University of Bristol and first author of the research paper, explains how the discovery was received in the physics community.