The LHC is preparing to restart at almost double the collision energy of its previous run. The new energy will allow physicists to check previously untestable theories, and explore new frontiers in particle physics. When the LHC is on, counter-rotating beams of particles will be made to collide at four interaction points 100 metres underground, around which sit the huge detectors ALICE, ATLAS, CMS and LHCb. In the video above, engineers and technicians prepare these four detectors to receive the

Lead-lead collisions start at the LHC after 5 years This week the heavy-ion physics season started for the Large Hadron Collider experiments, at the record energy of 6.8 TeV for the first time ever. The ongoing heavy-ion run is expected to bring significant advances in our understanding of quark-gluon plasma, the state of matter believed to have filled the #Universe up to a millionth of a second after the #BigBang. Take a look at the behind-the-scenes in the different control rooms and how physi

The Large Hadron Collider is one of the largest machines in the world. Its purpose is to fire subatomic particles at each other so we can better see how they function. Find out more about this massive machines in Colossal Machines, on Thursdays at 8pm, on National Geographic UK. | National Geographic UK