You won’t get a lethal shock, but the jumper cable clamp will probably pinch right through your tongue. 
“Not lethal” is not the same as “safe.” How can this possibly be safe (clamp trauma notwithstanding)? I would think the tongue presents rather low resistance and a car battery would be able to deliver a lot of amps.
I once drew the solar system in CAD and was impressed by the distances.
Here is a to scale view of the Earth and moon I threw together: earth radius is R6378 km, moon radius R1738 km, distance to moon from earth 378000 km.
Values are from here
Ever touched a 9-volt battery to your tongue? It tingles a lot, on the verge of being painful, but I’m not aware of anyone having died from it. 12 volts is only a bit higher.
On the scale where 7m represents the average Earth-Moon distance, Earth-Mars distance ranges from about 1 to 7 km, with an average around 4 km.
Maybe you’re thinking of the polarity of magnets and of the earth? What we call the north pole of a compass needle points to the north pole of the earth.
You and Xena seem to be missing the point. Of course the sequence wasn’t specified before the deal. Neither was the sequence of events that led to the creation of the world.
One fact I actually learned on The Dope: water pressure is dependent ONLY on depth, not on volume. Let’s say you have a 6" square pipe, 20 feet tall, completely full of water. The pressure on the lowest inch of one side of that pipe is equal to the the pressure on a 6" by 1" section of the Hoover Dam, 20 feet below the water level. The fact that you have an immense volume of water behind the dam doesn’t matter. The pressure is the same!
J.
But the essential point is: that sequence was not one that arose randomly. Nor was it “directed”.
The average person swallows 8 spiders only because I swallowed 56,000,000,000 spiders once.
not that big a feat when you consider the size of a baby spider, or is it?
No, that’s not the essential point. The essential point is that neither scenario is particularly noteworthy unless viewed in hindsight.
Agreed, I always test my nine volt batteries that way.
On the other hand, I remember reading about the lowest voltage electrocution according to a friend’s medical text book. The person accidentally killed himself by piercing his chest in two places with electrodes and then wiring them to a 12 V model train transformer.
ETA: Don’t try this at home!
What would possess one to try it anywhere?. Sticking electrodes in my chest and running current through them isn’t something I regularly have to be talked out of doing.
Accidentally?!
I looked for a cite and couldn’t find it. As I recall, and this is something I read >40 years ago, the victim was using this as an “autoerotic device.”
I’m normally a big fan of cites and the pursuit of knowledge, but in this case that may be for the best.
You must have the weirdest accent.