Degradation, over long periods of time, is a worry to some scientists, as is evident in this new study: “Can magic sand cause massive degradation of a gravel-bed river at the decadal scale? Shi‑ting River, China,” Chenge An, Gary Parker, Marwan A. Hassan, and Xudong Fu, Geomorphology, vol. 327, February 15, 2019, pp. 147-158. (Thanks […]