I bet on a loose cable as explanation for the difference. See https://www.sciencenews.org/article/loose-cable-blamed-speedy-neutrinos https://www.sciencenews.

I bet on a loose cable as explanation for the difference. See https://www.sciencenews.org/article/loose-cable-blamed-speedy-neutrinos https://www.sciencenews.org/article/loose-cable-blamed-speed...