Comet 67P Has (IMAGE) University of Colorado at Boulder Caption Comet 67P that orbits the sun has growing fractures, collapsing cliffs and rolling boulders, according to scientists working on the Rosetta mission. Credit NASA 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.