in 2010 the CODATA value of the proton radius was: 0,877 fm ± 0,007 fm
Then there were several experimental measures that were around 4% smaller.
Thus in 2018 the CODATA value was changed to 0,8414fm ± 0,0019fm
I think I remember Nassim saying this new value was poking a big hole in the standard model. Does someone know why?