Human beings are making it harder for extraterrestials to pick up our broadcasts and make contact, the world's leading expert on the search for alien life warned yesterday.
At a special meeting on the search for extraterrestrial intelligence (Seti), the US astronomer Frank Drake – who has been seeking radio signals from alien civilisations for almost 50 years – told scientists that earthlings were making it less likely they would be heard in space.
Astronomers assumed that a standard technique for any alien intelligence trying to pinpoint other civilisations in the galaxy would involve seeking signals from TV, radio and [....]
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