When was the zeptosecond created?

The zeptosecond, a unit of time equal to one sextillionth of a second (10^-21 seconds), was first measured in experiments conducted in 2016 by physicists at the Max Planck Institute for Quantum Optics. They used laser technology to observe the movement of electrons during a chemical reaction, marking the first time such a short duration was quantified. This breakthrough allowed scientists to study ultrafast processes in physics and chemistry with unprecedented precision.