A photo portrait of Nikola Tesla, taken about 1890 by Napoleon Sarony. The image originally appeared on a postcard. Tesla was born in 1856, so he was about 34 when this photo was taken.
One of the great geniuses of the early electrical age, Nikola Tesla patented over 700 inventions and made major contributions to radio, public lighting, and other electric fields of endeavor.
Photo via Wikimedia Commons.