In 1902, the famous inventor and futurist Nikola Tesla set up shop on Long Island to begin the work of his greatest experiment. He envisioned building a global wireless power supply system: a network of towers that could illuminate cities, transmit communications, and even build power planes in the sky without wires. Based on his laboratory, he developed the first prototype transmission device, a large structure known as the Warden Cliff Tower. Today, of course, we live in a deep wire world. Over-the-air communication is everywhere. But with a few exceptions like cell phones and toothbrushing, we still send and receive electricity through wires. What happened to Tesla’s big ambition? We went to Wardencliff to check the remains of the lab and talk to a couple of engineers and physicists about what was right and what was wrong with Tesla. There are some improvements in the world of wireless power transmission today. So … was Tesla in any case? Watch the video above to find out.