When galaxies collide (VIDEO) University of Tokyo This video is under embargo. Please login to access this video. Caption Visualizations of the dynamic model simulating a collision increasing core activity. Credit © 2021 Miki et al. Usage Restrictions None License Licensed 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.