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NPR's podcast Planet Money did a piece on brushing which goes into bit more detail than the BBC article: https://www.npr.org/transcripts/606517326 https://www.n
by bentcorner 6y ago
NPR's podcast Planet Money did a piece on brushing which goes into bit more detail than the BBC article: https://www.npr.org/transcripts/606517326 https://www.npr.org/transcripts/606517326