René Laennec invented the stethoscope in 1816 by observing children playing on an oak beam with a needle. Engineer Cyrille Lecroq took part in the battle against Covid-19 to modernize it in his spare time. Read more
René Laennec invented the stethoscope in 1816 by observing children playing on an oak beam with a needle. Engineer Cyrille Lecroq took part in the battle against Covid-19 to modernize it in his spare time. Read more