For 21 years, enthusiasts have used their home computers to search for extraterrestrial life. UC Berkeley scientists have been analyzing 100 signals they discovered. This ambitious project, SETI@home, has captivated millions worldwide since 1999, inviting them to contribute to the search for advanced civilizations in our galaxy. By downloading the SETI@home software, volunteers allowed their computers to analyze data from the Arecibo Observatory, seeking unusual radio signals from space. The project's computations yielded 12 billion detections, each a 'momentary blip of energy at a particular frequency coming from a particular point in the sky.' After a decade of work, the team has narrowed down these detections to 100 promising signals, which they are now using China's FAST telescope to investigate further. Despite the lack of ET contact, the SETI@home project offers valuable insights for future searches, highlighting potential flaws in current methods. The challenge lies in distinguishing genuine signals from noise and radio interference, a task made more complex by the vast number of possible signals. To address this, Anderson and Korpela inserted fake signals into their data, allowing them to measure sensitivity and exclude noise. The project's success lies not only in its scientific contributions but also in its ability to engage a global community of volunteers, demonstrating the power of distributed computing and the enduring fascination with extraterrestrial intelligence.
