Light particles seen bouncing off each other for first time
Physicists at CERN have announced the first direct evidence of light interacting with itself at high energy, a very rare process in which two particles of light called photons bounce off each other. Studying over 4 billion events taken in 2015, scientists found 13 candidates for light-by-light scattering. Notably, CERN's observations had confirmed the 'God Particle' Higgs boson in 2012.