Ruby-forming mineral found by Mars rover hints at violent impacts

So far, most of the minerals found on Mars tell a story of lava poured out by ancient volcanoes, followed by long stretches in which water trickled through and slowly reshaped the rock. However, some rocks scattered across the Martian surfa…

Summary from Phys.org - Space.

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1. Phys.org - Space 18 Aug
   Ruby-forming mineral found by Mars rover hints at violent impacts ↗