City lights may aid in search for extraterrestrial life

It's difficult to look at the night sky and not wonder whether intelligent life exists out there. Indeed, the odds are very much in favor of there being countless civilizations scattered throughout the heavens, but the challenge remains in proving it. Recently, two scientists hit upon the novel but common-sense idea of searching for city lights on the dark side of distant worlds- a task advanced next-gen earth and space-based telescopes will likely be able to tackle in the not-too-distant future.

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