C. R. "Chuck" Downing shared - Authors Bureau ECN: Speak with a favorite author by phone

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C. R. "Chuck" Downing shared: 6/24/2017 1:05:02 AM

#SciFact 9/30/2015 Liquid water on Mars! Seasonal wet/dry cycles documented. @SherryFrazier https://t.co/aCuvUUNPUy
— C.R. Downing (@CRDowningAuthor) June 24, 2017