Ben Allanach is a professor of theoretical physics at the University of Cambridge. Before that he was a post-doc at LAPP (Annecy, France), CERN (Geneva, Switzerland), Cambridge (UK) and the Rutherford Appleton Laboratory (UK).
Antimatter particles obey gravity: that's the conclusion from a study this week testing whether antimatter - the mirror image material of the matter we're all made from - "falls" upwards, or downwards. Although very much the preserve of the sciFi arena, antimatter is a very real entity - we use it all the time in medical imaging, for instance. In traditional matter, the