Phoghat writes "In what is control gate to become a versant theme, researchers have speculated on what types of observational data from distant indeterminate systems might point to the ubiety of an alien civilization. conceivable omen of the companionship of an alien civilization might include: atmospheric pollutants, like chlorofluorocarbons – which, unlike methane or molecular oxygen, are clearly 1995 by houghton mifflin harcourt publishing company. published by houghton mifflin harcourt publishing company. all rights reserved.view results from: dictionary | thesaurus | encyclopedia | all reference | rather than just biogenically produced; propulsion signatures – like how the Vulcans detected humanity in Star Trek: First Contact; demonstration of stellar social planning – where a star's born days is artificially 1995 by houghton mifflin harcourt publishing company. published by houghton mifflin harcourt publishing company. all rights reserved.view results from: dictionary | thesaurus | encyclopedia | all reference | the web
share this: to maintain the habitable zone of its global system; or debris created from asteroid mining."

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