During the summer of 1899 Tesla set up a field laboratory in Colorado Springs, Colorado, to the possibilities of using high-altitude stations to transmit information and electric power over long distances. One July day, while tracking lightning storms, Tesla’s equipment picked up a series of beeps. After ruling out solar and terrestrial causes, he concluded that the signals must be from another planet. The following Christmas, in response to the American Red Cross’s request for a prediction of the greatest scientific achievement of the coming century, Tesla wrote, “Brethren! We have a message from another world, unknown and remote. It reads: one… two… three…” In 1996 scientists published a study replicating Tesla’s experiment and showing that the signal was in fact caused by the moon Io passing through Jupiter’s magnetic field.