Nope, but there are unanswered questions.<quoted text>
As long as there are questions humans can not answer there is super natural.
We once thought lightening was supernatural. But nope it happens when...
negative charged electrons in a cloud are attracted to positive charged protons in the ground, and enough of them accumulate in a spot to overcome the insulating resistance in the air between them.
Then they jump toward each other, sending a surge of electrons into the ground. We see the flash of energy and while this charge heats the air along their paths. Causing it to expand rapidly making the sound of thunder.