What makes you think ETs will be using radio?  Especially when it would
typically take over a hundred years for such signals to reach a destination.

DaveL


"John Donson" <harigejan@hotmail.com> wrote in message
news:40ea682b$0$8443$ba620dc5@nova.planet.nl...

Join the search for extra terrestrial life and install SETI-BOINC on your
PC.

It uses the idle time of your pc to analyse radiosignals from space.

http://setiweb.ssl.berkeley.edu