I did my PhD in the Eöt-Wash group [0] at the University of Washington, where many of the "world's best" torsion balance experiments have be done: tests of the

I did my PhD in the Eöt-Wash group [0] at the University of Washington, where many of the "world's best" torsion balance experiments have be done: tests of the equivalence principle, measurement of gravity at short distances, measurement of the gravitational constant, and others. The 3 professors in the group won the Breakthrough Prize in Physics last year. When this article came out a few months ago I was surprised it got so much press. If I'd had any idea it would get so much attention (and merit a paper in Nature) I would have pushed for us to do it :) The authors did a great job doing the experiment and addressing the possible systematics--doing torsion balance experiments the right way is difficult--but there doesn't seem to be anything too new here. [0] https://www.npl.washington.edu/eotwash/ https://www.npl.washington.edu/eotwash/ [1] https://www.washington.edu/news/2020/09/10/four-uw-professors-win-2021-breakthrough-prize-so-called-oscars-of-science/ https://www.washington.edu/news/2020/09/10/four-uw-professor...