With Halloween just ahead, everywhere we turn we are besieged by images of witches, warlocks, ghosts, goblins, vampires, and zombies. If you are one of the ghosts, you can stop reading right now because you don’t need water.  Any water.  Vampires have their own source of hydration, of course. 

However, it’s a bit different when you’re a zombie.  Zombies, while creepy and semi-gone, still walk the Earth.  In fact, I don’t recall …