It was around 16 inches long. Then in 1852, George Camman introduced the first binaural (for two ears) stethoscope, which was around 20 inches. Today’s stethoscopes are up to 30 inches long. Born of ...

Whilst it may not be a necessary feature for everybody, measuring the distance between two points on a screen is indispensable for web designers and developers and can generally prove quite useful.