A slice through an Allende meteorite (IMAGE) University of Arizona Caption A slice through an Allende meteorite reveals various spherical particles, known as chondrules. The irregularly shaped "island" left of the center is a calcium-aluminum rich inclusion, or CAI. The grain in this study was isolated from such a CAI. Credit Shiny Things/Wikimedia Commons Usage Restrictions This visual may only be used for the purpose of posting and/or reporting of this news release. Credit information must be provided as indicated. 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.