IN a note to NATURE (Dec. 2, 1922) some experiments were described in support of a theoretical explanation advanced in an earlier paper (Phil. Mag., vi. 44. 338–45) regarding the nature of soil ...
Using orbital instruments to peer into Jezero crater, the landing site for NASA's Mars 2020 rover, researchers found deposits of hydrated silica, a mineral that's great at preserving microfossils and ...