Making Matter from Collisions of Light (IMAGE) DOE/US Department of Energy Caption Two gold ions (Au) moving in opposite directions close to the speed of light (v≈c) are each surrounded by a cloud of real photons (γ). When these photons collide, they create a matter-antimatter pair: an electron (e-) and positron (e+). Credit Image courtesy of Brookhaven National Laboratory Usage Restrictions Image courtesy of Brookhaven National Laboratory License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.