Mars streaks are sand, not water, reports NASA News 21 November 2017, Science (AAAS) News 22 November 2017, Astronomy Now 26 November 2017, and Nature Geoscience doi:10.1038/s41561-017-0012-5, 20 November 2017. Dark streaks on crater slopes that came and went with the passing seasons have been presented as evidence of liquid water flowing on the surface […]
