Relevanttimedurationsformodernsciencerangefromthefemtosecondofveryfastelectronicstotheageoftheuniverse,15billionyears.Thiscorrespondstoarangeofabout32ordersofmagnitude.Moreover,thisvariablecanbecontrolledandmeasuredwithanaccuracybetterthan10−14bymodernatomicclocks.However,theaccu