Thursday, February 9, 2012



Acheron

Acheron
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Acheron

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Acheron

Slope Streaks in Acheron Fossae on Mars

by Father Sky

What creates these picturesque dark streaks on Mars? No one knows for sure. A leading hypothesis is that streaks like these are caused by fine grained sand sliding down the banks of troughs and craters. Pictured above, dark sand appears to have flowed hundreds of meters down the slopes of Acheron Fossae. The sand appears [...]

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