I've now looked ta 695h of muon decay data, same as the length of a data run used in an inspiring paper (Hall, R.E. et al. AJP, Vol 38, No. 10, 1970). I find the lifetime to be 2170 +/- 29 ns; Hall found 2106 +/- 58 ns. Not bad! From 1970 to now, same muon lifetime. :-) https://twitter.com/drsekula/status/1249453015171584004/photo/1 https://chirp.cooleysekula.net/attachment/64544