[newguy357]

There is a great deal of effects that we use, and don't understand, like why the electrons flow on the outside circumference of the wire?

You're absolutely correct that there are many things we do not yet understand. Not to nitpick, but the example you used (charge flowing to the outside of a conductor) is something we do understand.

[Cold Heat]

We did not understand it 35 years ago when I first trained as a electrician. We only knew it did. Or at least some people knew it.

This is why most wire was solid.

We eventually derated the solid wire construction and uprated the stranded, which carried more current with less copper.

The last technical class I had on that subject was in the late eighties, when the phrase, "not completely understood" was used.

Praytell, do you know why?

Specifically why electrons flow on the surface, and not so much down the middle of a conductor....?