References
- Lia S, Lucey PG, Milliken RE, et al. Direct evidence of surface exposed water ice in the lunar polar regions. Proc Natl Acad Sci. 2018;115:8907–8912.
- Orosei R, Lauro SE, Pettinelli E, et al. Radar evidence of subglacial liquid water on Mars. Science. 2018;361:490–493.