From: richard@poontang.nospam.com.au   
      
   Gordon D. Pusch wrote:   
   > Scientists are not the _least_ bit "baffled" by these markings: They have   
   > been known and understood almost since the earliest mars orbiters, and are   
   > caused by "dust devils" picking up the light-colored fine dust from off of   
   > the martian surface to expose the darker "soil" underneath.   
   >   
   > "Dust devils" are a quite common weather phenomenon on Mars, and there   
   > are a number of very nice orbital photos that have caught them in the act   
   > of vacuuming up the dust and "fines" off the surface, leaving exactly   
   > such a "worm trail" behind them.   
      
   Speaking of wind(!) - what does MER use to measure wind velocity? actualy, a   
   better question would be: Is it measuring wind velocity?   
      
   Cheers,   
   Richard   
      
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