CERN, the European Organization for Nuclear Research, is one of the world's largest and most respected centres for scientific research. Its business is fundamental physics, finding out what the Universe is made of and how it works. At CERN, the world's largest and most complex scientific instruments are used to study the basic constituents of matter — the fundamental particles. By studying what happens when these particles collide, physicists learn about the laws of Nature. ----- CERN welcomes your comments and will moderate comments using these guidelines: Please keep comments relevant. Irrelevant, inappropriate or offensive comments may be deleted. Stay on topic. Other readers expect the comments about a post to deal with the topic at hand.