Is lightning always hit the ground?
People already knew that lightning was powerful and lightning never hit the kite. If it had, he would have been killed. He almost did himself in later in life, with a device that generated electricity. He was showing off for the ladies and managed to produce enough power to knock himself flat. The device is now at the Delaware County Institute of Science (Media, PA). Two more things he invented were the Franklin stove and the glass harmonica.
Absolutely. A limited slip differential senses when one of the rear wheels spins and automatically locks up the opposite wheel to provide traction - exactly the situation you encounter in winter snow/ice on grades. Assuming you are already running a set of All-Terrain or Mud/Snow rated tires, an additional measure you can take (if you haven't already) is to load a couple of bags of sand or cat litter in the very back of your Explorer near the liftgate when you're going to be driving in these conditions. Even in an SUV, the additional weight back there will help maintain traction, and you've got the sand/litter on hand to pour on the ground ahead of the rear wheels in case you do get stuck in a bad spot over ice/slush. Good luck.
If you can find one that fits your vehicle, that's what they are for.
