A small town in England was plagued by a low-frequency hum that only some residents could hear. It went on for years, always at night, driving people mad. Scientists and engineers tried to find the source, but no one could pinpoint it. One day, the hum just stopped, leaving behind only questions.
My Take: Sound is one of the strangest forces in nature. It can travel through walls, vibrate through the Earth, and even cause hallucinations. Maybe this was a natural phenomenon, or maybe something was out there testing something. Either way, it is eerie that it just vanished without a trace.