49K views · 866 reactions | How to make a wireless telegraph click https://linktw.in/64UMp1 | KR inventor | Facebook
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3.2K views · 51 reactions | René Théophile Hyacinthe Laënnec, inventor of the stethoscope, would have turned 235 on February 17, and has been honoured with a Google Doodle. | The Telegraph | Facebook
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