Stolen from zonereyrie:
Which Historical Lunatic Are You?
A minister's son from Simljan in Austria-Hungary, you were precocious from an early age. At three you could multiply three-digit numbers in your head and calculate how many seconds visitors to your home had lived. In awe of your older brother Dane, you shot a pea-shooter at his horse, causing it to throw him and inflict injuries from which he later died. This tragedy haunted you ever after.
You developed an aversion to human contact, particularly involving hair, and a fear of pearls; when one would-be lover kissed you, you ran away in agony. Later, you insisted that any repeated actions in your day-to-day life had to be divisible by three, or, better yet, twenty-seven. You would, for example, continue walking until you had executed the required number of footsteps. You refused to eat anything until you had calculated its exact volume. Saltine crackers were a favourite for their uniformity in this respect. In the midst of important work, you forgot trivial details such as eating, sleeping or, on one memorable occasion, who you were.
Now successful, you set up a small laboratory, with a few assistants and almost no written records whatsoever. Despite it being destroyed by fire, you invented the Tesla Coil, impressing even the least astute observer with man-made lightning and lights lit seemingly by magic. Moving to Colorado Springs, you created a machine capable of sending ten million volts into the Earth's surface, which even while being started up caused lightning to shoot from fire hydrants and sparks to singe feet through shoes all over the town. When calibrated to be in tune with the planet's resonance, it created what is still the largest man-made electrical surge ever, an arc over 130 feet long. Unfortunately, it set the local power plant aflame.
Your inventions grew stranger. One oscillator caused earthquakes in Manhattan. You adapted this for medical purposes, claiming various health benefits for your devices. You found they let you work for days without sleep; Mark Twain enjoyed the experience until the sudden onset of diarrhoea. You claimed to receive signals in quasi-Morse Code from Mars, explored the initial stages of quantum physics; proposed a "wall of light", using carefully-calibrated electromagnetic radiation, that would allegedly enable teleportation, anti-gravity airships and time travel; and proposed a basic design for a machine for photographing thoughts. You died aged 87 in New York, sharing an apartment with the flock of pigeons who were by then your only friends.