From Scotsman.com:
SATELLITE TV and the digital revolution is making humanity more and more invisible to inquisitive aliens on other planetsThat might be good news for anyone who fears an Independence Day -style invasion by little green men. But it is also likely to make the search for extra-terrestrial intelligence by Earthly scientists harder.
Speaking at the Royal Society in London, Dr Frank Drake, the world’s leading ET hunter, said the digital age was effectively gagging the Earth by cutting the transmission of TV and radio signals into space.
At present, the Earth was surrounded by a 50 light year-wide “shell” of radiation from analogue TV, radio and radar transmissions, he said.
But although the signals had spread far enough to reach many nearby star systems, they were rapidly vanishing before the march of digital technology
[Read more at Scotsman.com]
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