Week of 4 February 2019 

Exposing the Rock in Impact Craters
Exposing the Rock in Impact Craters
Impact cratering allows scientists to study the bedrock of Mars that normally lies under a coating of red-colored dust.  
Layered History
Layered History
The geologic history of a planet is written in its layers.  
A Dune Field near Nili Patera
A Dune Field near Nili Patera
The orientation of these dunes tells us the direction of the prevailing wind.  
Wind Flow
Wind Flow
The ripples in the sand tell us which way the wind was moving and how it was diverted around these rock formations.   
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