SETI@home takes a closer look at 100 notable signals

A screenshot of the SETI@home user interface on a desktop computer in 2009. The software ran on millions of home computers worldwide, analyzing radio data from space in search of signals from extraterrestrial civilizations. Image via Robert Sanders/ UC Berkeley.

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• UC Berkeley’s SETI@home project was one of the most popular crowd-sourced research projects ever. For 21 years...