One of the great things about science is that we can determine whether a phenomenon is likely real without having to have the slightest clue what the mechanism might be. Evidence comes first, and this looks like solid evidence, and mechanism can come later; the evidence alone proves the existence of something interesting, and that's what's worth a follow-up.
Hypothesis generation is important, because it helps us design the next experiment, but this experiment is already very interesting.
Hypothesis generation is important, because it helps us design the next experiment, but this experiment is already very interesting.