Standard physics is having an increasingly embarrassing time. It failed to predict the galaxy rotation problem, then cosmic acceleration, both just about the biggest anomalies you could imagine, representing 96% of the whole cosmos. These embarrassments have been hidden under the carpet with the fudges of dark matter and dark energy (whereas MiHsC predicts the embarrassments). There have been other anomalies too: the low-l CMB anomaly, the alignment of quasars, the spacecraft flyby anomaly, the Tajmar effect, the emdrive (all of which MiHsC predicts), but these anomalies have mostly been ignored by the mainstream who are focusing on the internal consistency of a standard model ever more at odds with nature (Rearranging deckchairs on the Titanic). However, now comes an anomaly (the proton radius puzzle) that is so central to the standard model that it will be impossible for them to ignore.
The proton radius is well predicted by the standard model as 0.88x10^-15m and has been measured as such for many years. You can measure it by bouncing electrons off the hydrogen nucleus (a proton) or by firing lasers at electrons orbiting the nucleus in their circular train tracks (to use the simplified Bohr model) and seeing how far they jump between tracks, a jump that depends on the proton charge radius because of the Lamb shift (an effect of the quantum vacuum).
In 2010 a group at the Paul Scherrer Institute in Switzerland decided to see what would happen if they made a hydrogen atom, replacing the electron with its overweight twin the muon (identical to the electron, except 200 times heavier). The advantage of using a heavier muon was that it orbits much closer to the proton thus allowing a more accurate result when they track the maths back to predict the proton radius. To their surprise the muon jumped a bit more than expected between its orbital levels and the equations leading back to the proton radius implied it was 0.84x10^-15m: 4% smaller than before (this was confirmed in 2013 and 2016, see Pohl et al. below). This is an anomaly seven times larger than the uncertainty in the original proton radius measurement (a so-called 7 sigma anomaly), so it constitutes a significant discovery.
The trouble, or rather the opportunity, here is that there is nothing in the standard model to allow for a proton to shrink in the close presence of a muon. Cue MiHsC? I'm now reveling in the summer research period and I've just submitted two theoretical papers on MiHsC, one of them predicting the electron mass and showing that tight orbits can release mass-energy in a new way, accounting for gravity for example. It is interesting that this proton radius anomaly is wrapped up in the Lamb shift, a quantum vacuum effect. MiHsC is also a quantum vacuum effect.
Accessible report about it by John Timmer, Ars Technica: Report
A more technical arxiv summary: http://arxiv.org/pdf/1502.05314v1.pdf
Latest paper by Pohl et al., 2016. Science. http://science.sciencemag.org/content/353/6300/669