We have had clocks with the accuracy to display fractions of a second for about 120 years (pre-WW1 stop watches were accurate to the 1/10 of a second) and milliseconds for about 50 years but there is no real use as the second is the shortest practical amount of time the vast majority of humans need in their daily lives.
We have had clocks with the accuracy to display fractions of a second for about 120 years (pre-WW1 stop watches were accurate to the 1/10 of a second) and milliseconds for about 50 years but there is no real use as the second is the shortest practical amount of time the vast majority of humans need in their daily lives.