Mars Streaks are Sand

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 […]

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