I've long been a fan of Nikola Tesla. When we were planning our route and I realized that it passed through his home country of Serbia, I was excited to learn there was a museum dedicated to his work there. So, today, nearly two years after we stuck a pin in a map halfway around the world, we went!
One of the first displays we saw: Nikola Tesla's ashes. Spooky.
Here, an invention which revolutionized the world: Tesla's induction motor powered by his polyphase alternating current. Every time you plug something in, you're using an invention made by a man modern history has all but forgotten.
Of course, there were many Tesla coil displays as well. Apart from looking cool, Nikola Tesla was convinced that with slight variations on the design he could power the entire world wirelessly with them, inducting energy from the Earth's magnetic field.
In 1899, transmitting 100 million volts of high-frequency electric power wirelessly over a distance of 26 miles, he lit up a bank of 200 light bulbs which were simply stuck into the ground.