Cern hosts a complex of particle accelerators, including the large hadron collider (LHC), the largest and most powerful accelerator in the world. At the Laboratory, scientists probe the structure of the Universe, studying the fundamental constituents of matter and how they interact. By so doing, they attempt to answer fundamental questions: What is the Universe composed of? How did it develop? What is the origin of matter?
Although astronomers cannot directly see dark matter, we observe how the gravity of massive galaxy clusters, which contain dark matter, bends and distorts the light of more distant galaxies located behind the cluster.
NASA/ESA, Hubble Telescope