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Communications of the ACM

ACM Opinion

Little Green Men Might Not Be So 'green'


Orion Nebula

SETI has traditionally focused on looking for signs of life by scanning the skies for electromagnetic radiation. Above, a false-color view constructed using infrared data from the Spitzer Space Telescope of the Orion Nebula.

Credit: NASA/Reuters

Humans are affecting the Earth’s systems on a global scale. Industrial pollutants are accumulating in our atmosphere with the potential for long-term impact on global climate and biodiversity.

From Slate
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