I find it somewhat comforting that we are still doing seemingly simple science experiments and seeing puzzling results. It’s nice to think that not all of the meaningful physics experiments happen at extreme temperatures and pressures. That they just shone some light on some metal and saw a surprising result makes science seem approachable. I don’t mean to diminish the work of these scientists. I’m sure measuring those currents was far from trivial. And of course they decided to do the experiment in the first place, which is the most important part.