Junjun Zhang, University of Chicago (IMAGE) University of Chicago Caption Junjun Zhang, graduate student in geophysical sciences, measured the titanium isotopic compositions of five terrestrial samples, 37 meteorites and 24 lunar samples in environmentally controlled conditions at the Origins Laboratory at UChicago. She found that the moon’s titanium isotopic composition is virtually identical to Earth’s. Credit Lloyd DeGrane Usage Restrictions News organizations may use this image in connection with reports about the research of Nicolas Dauphas and Junjun Zhang. 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.