BAO Animation (VIDEO) DOE/Lawrence Berkeley National Laboratory This video is under embargo. Please login to access this video. Caption This animation shows how baryon acoustic oscillations act as a cosmic ruler for measuring the expansion of the universe. Credit Claire Lamman/DESI collaboration and Jenny Nuss/Berkeley Lab Usage Restrictions N/A 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.