René Laennec - How he invented the Stethoscope !
In 1816, shyness led Laennec to invent the stethoscope. He was examining a young woman complaining of heart problems. At that time, doctors generally listened to patients' heartbeats by resting an ear against the patient's chest, but the conservative Laennec thought this improper under the circumstances, especially as she was overweight. He rolled a piece of paper into a tube and pressed it to her chest, allowing him to hear the sounds of her heart. Some believe he was inspired by the flute, which he used to play.