Perytons (1998-2015)

Perytons were mysterious radio signals detected for years, primarily at the Parkes Observatory in Australia. These dispersed bursts appeared to originate from Earth's atmosphere, leading to widespread speculation about their cause, including exotic atmospheric phenomena or even instrumental error. The mystery was solved in 2015 when they were traced to microwave ovens being opened prematurely by staff at the observatory, providing a humorous but scientifically important lesson in signal identification.