Dr. Frankenstein, if you're reading this, you have reason to feel a little vindicated. While the modern scientific community may laugh at your use of harnessed lightning bolts to animate a stitched-up monster, they're at least admitting that lightning may have played a vital role in the evolution of life on Earth.
Granted, all this isn't going to keep any rioting villagers away from your castle (and good luck talking down your own monstrous creation with the data), but a recent New Scientist article highlights some interesting findings from the University of Arizona.
It breaks down like this: When lighting strikes sand, it can fuse it into a glassy substance called a fulgurite. The Arizona researchers examined some fulgurites and found that lighting fries phosphorus into phosphite -- a less common, partially oxidized from of phosphate. In this form, it's also more digestible by many microbes.
Today, most of the Earth's phosphites come from rusting steel, but obviously that only came about with human technological advances. Travel back into the depths of prehistory and you might find early, microscopic life forms depending on lighting strikes to give them the ingredients they needed to form their RNA and DNA.
So how's that for a little Promethean fire?