According to Teh Google, it's Nikola Tesla's birthday, so they've got this image:
However, according to Wikipedia, his birthday is tomorrow.
So, whichever, he was a visionary scientist (but couldn't take care of finances to save his hide) who doesn't really get the respect he deserves.
"This publicity photo taken at Colorado Springs was a double exposure. Tesla posed with his 'magnifying transmitter' capable of producing millions of volts of electricity. The discharge shown is twenty-two feet in length."
(photo and text via PBS online)
Happy 153rd Birthday, Mr. Tesla, today or tomorrow!!