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Do aliens use CFCs?

What if the search for extra-terrestrial life took a new turn? A grant recently awarded to a team of scientists will finance research for "technosignatures", which would include CFCs.

The search for extraterrestrial intelligence, or SETI, began in the early 20th century. The technologies available to us today allow us to consider further research. Some telescopes such as the Allen Telescope Array (ATA) make it possible to examine exoplanets...

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