In this talk Nazim Hussain, Oxford University, will provide an introduction to matter and antimatter and the interplay between them. As far as we can tell, our universe is filled with galaxies and planets (and people) all of which are made of matter. But, our universe could have been absolutely empty with nothing in it at all! In this talk, I will provide an introduction to matter and antimatter and the interplay between them. I shall also explain how the fact that we live in a universe filled with matter is one of the mysteries of modern physics, a puzzle that particle physicists are trying to resolve using the Large Hadron Collider (LHC) at the CERN laboratory. Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales; http://creativecommons.org/licenses/by-nc-sa/2.0/uk/