/ Ryugu Content for 不良研究所 en /blog/hayabusa-2-sample-return-mission-suggests-protracted-wetter-asteroids <p>New results from the Hayabusa-2 space probe show that asteroids formed at the very beginnings of our Solar System retained substantial amounts of water for hundreds of millions of years, potentially delivering water to Earth and other planets for much longer than previously thought. The work by a large international team, including Professor Qing-Zhu Yin at the 不良研究所 Department of Earth and Planetary Sciences, was <a href="https://www.nature.com/articles/s41586-025-09483-0">published Sept. 10 in Nature</a>.&nbsp;</p> September 16, 2025 - 4:36pm Andy Fell /blog/hayabusa-2-sample-return-mission-suggests-protracted-wetter-asteroids