For some, All Wheel Drive is some kind of black magic that keeps four tyres attached to the road.
For the rest of us, there is some actual science and structure involved alongside an understanding of torque vectoring, and ... uhhhhh, OK, I'm in the first camp. This vid does a pretty decent job of actually explaining how the AWD OGs, Subaru, keep their wheels in motion. Then not. Then in motion again.
Probably best to watch this guy explain it. Better living everyone!