Matter to matter, actually. LHC shoots protons and antiprotons at each other, also it can shoot heavy nuclei and anti-nuclei at each other. Other types of colli

Matter to matter, actually. LHC shoots protons and antiprotons at each other, also it can shoot heavy nuclei and anti-nuclei at each other. Other types of colliders can also use electrons and positrons. https://home.cern/about/updates/2018/07/lhc-accelerates-its-first-atoms https://home.cern/about/updates/2018/07/lhc-accelerates-its-...