Paper here: http://science.sciencemag.org/content/353/6300/669 http://science.sciencemag.org/content/353/6300/669 Just reading the journal article now, but if

Paper here: http://science.sciencemag.org/content/353/6300/669 http://science.sciencemag.org/content/353/6300/669 Just reading the journal article now, but if I've interpreted the Quanta article correctly, this is an important development. The proton radius puzzle has resisted resolution for long enough to be regarded as a long-standing problem. Pohl's proton measurement is widely respected (indeed, there's a known calibration line between the expected and observed values, so it's hard for it to be incorrect), but nobody has a way to solve the problem.