Mission to trumpet new discovery. The US space agency is set to announce more "significant scientific findings" from its Mars rover Opportunity. [BBC News | News Front Page | World Edition]
From the article:
Sedimentary rocks can be formed through the action of wind. But Dr Dave Rubin of the US Geological Survey (USGS) told a news conference in Washington, US, that the form of the cross-bedding matched best with sediments laid down in water.
I know Dave, he is an expert in understanding how bedforms produce internal structures like cross-bedding. If Dave says this cross-bedding was produced by moving water, it was.
12:32:58 PM 
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