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

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C. R. "Chuck" Downing shared: 8/15/2017 1:05:08 AM

#SciFact Ounce for ounce, bone is stronger than steel & about four times as strong as concrete @SherryFrazier https://t.co/WK2guhYUC9
— C.R. Downing (@CRDowningAuthor) August 15, 2017