Large Millimeter Telescope (IMAGE) University of Massachusetts Amherst Caption This is the Large Millimeter Telescope on the summit of Sierra Negra, an extinct volcano in Mexico. Credit James Lowenthal 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.