Explore the CERN accelerator complex, filmed during the exceptional #CERNOpenDays visits. Each Sunday evening, we will release a new video. Watch the fourth episode, featuring the places where we collide particles in the LHC. Did you know that the beams inside the LHC are made to collide at four locations around the accelerator ring, corresponding to the positions of four particle detectors – ATLAS Experiment at CERN, CMS Experiment at CERN, ALICE experiment and LHCb Experiment at CERN? Find out

From photographs of bubbles in a chamber filled with liquid to complex 3D simulations of event collisions, the art of picturing particles has undergone significant change for the past 65 years. Relive this journey with ATLAS Experiment at CERN's amazing video. | CERN

Since 2003, a LHC dipole magnet turned into a telescope has been following the Sun's movements from behind a concrete wall. This is the CAST experiment - hunting for hypothetical "axion" particles that could be produced in the centre of our star ☀️ Find out more about this experiment: https://home.cern/science/experiments/cast | CERN

Take a sneak peek 106 meters underground at CERN as we show you how the cavern of the largest particle detector ATLAS Experiment at CERN looks like 🤩 Read more about ATLAS's first observation of WWW production: https://home.cern/news/news/physics/atlas-reports-first-observation-www-production 🎥 by Anais Gerard | CERN

Relive 2019 at CERN, from engineering and accelerator milestones to particle physics results and much more. This video will take you on a journey through key moments of 2019 at CERN. Enjoy! #2019inreview | CERN