Terrestrial Objects (image) NASA/Goddard Space Flight Center Share Print E-Mail Caption A NASA team scanned these terrestrial rock samples, all measuring two to four inches in diameter, to investigate possibilities for future in-space use of non-destructive evaluation techniques. The two rock samples on the bottom are from Earth's newest volcanic island in the Kingdom of Tonga; the sample on the upper left from kilometers deep contains large green olivine crystals and came from Oahu in Hawaii. The sample on the upper right is a 3.7-million-year old impact melt breccia from the Elgygytgyn impact crater in Siberia. Credit Credits: NASA/W. Hrybyk Usage Restrictions None Share Print E-Mail 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.