Speleologists Thoroughly Studied Lava Tubes (IMAGE) Università di Bologna Caption The morphological surface expression of lava tubes on Mars and the Moon is similar to their terrestrial counterpart. Credit ESA / Luca Ricci 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.