If you don't know how something happened, an intellectually honest position is to say: "I don't know how it happened.", not to invent an answer.
That is why I love scientific method, someone said: Science is fallow evidence to an answer, faith is make evidence for a desire answer (something like that). If we can't have the answer for something right now is no problem for me, even if what we actually known change is not a problem either because I trust scientific method and known that it is the more closest thing near the truth.