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Listening for a signal

The SETI Institute and the University of California at Berkeley are using radio dishes to search for life elsewhere in our galaxy.
Allen Telescope Array
The Allen Telescope Array is an example of small parabolic dishes and will cover a frequency range of 1 to 25 GHz.
SKA consortium
A project searching for signs of advanced civilizations is the Allen Telescope Array (ATA), some 350 proposed 20-feet-diameter (6 meters) radio dishes in northern California.

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