Asteroid Ryugu in False Color (IMAGE) University of Tokyo Caption It is unclear how Ryugu's parent body became so dehydrated. It's possible it was internally heated by radioactive materials, or suffered prolonged bombardments by other rocky bodies. Credit © 2019 Seiji Sugita et al., <em>Science</em> Usage Restrictions © 2019 Seiji Sugita et al., <em>Science</em> 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.