How to Search for Aliens . ... Credit Copyright: SETI@home , UC Berkeley SETI Team Explanation: "Mom, can I use our computer to search for aliens?" Last week, the SETI@home project released free software that enables many home computers to search for signals from intelligent extra-terrestrials . ... The resulting software can work as a screensaver and so after down load ing a chunk of data, will only search for alien signals when the computer is otherwise idle. ... NASA Official: Jay Norris. ...