As Analog Dies, Earth Falls Silent

Mankind's odds of being discovered by aliens are plummeting as digital chatter makes Earth all but invisible from space. Whereas old-fashioned analog signals spread millions of miles into space, digital signals stay put. As we move toward the latter, says space expert Frank Drake, Earth becomes harder to find.

"If this continues into the future, very soon our world will become undetectable," he tells the Telegraph. But the Search for Extra-terrestrial Intelligence founder still has hope. "We're going to have to search many more stars and many more frequencies," he says. Still, he is confident that there is somebody out there—and that they're smarter than us.

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