This is all heresy and conjecture, but I think Al Gore invented it. No just kidding. I had someone who had a friend who knew a guy tell me it was born from the nebulizers doctors and hospitals use to treat lung disorders and asthma attacks. Nebulizers and atomizers work slightly differently, but the end result is the same. A nebulizer uses a sterile base (not sure what) mixed with small amounts of medicine, then by some process bring that mixture to a cool vapor for inhalation. Some smart person replaced medicine with nicotine and flavors, found a safe and readily available base (PG), and voila! Bring to a boil (atomization) and inhale. I don't have any hard facts to support this, it's just what I was told, and it sounds reasonable to me.