Do Aliens Use Hairspray?

Radio telescopes such as the Arecibo Observatory have looked for electromagnetic signals from extraterrestrial worlds. But what about looking at the atmosphere of distant planets?

But what about more advanced life? Could we find tell-tale signs that a planetary system had been modified or<a href="http://en.wikipedia best natural weight loss supplements.org/wiki/Terraforming”> terraformed in order to make it more habitable for intelligent alien species? For instance, when humans colonize Mars, we will need to raise global planetary temperatures significantly in order to live on the surface without suits. Might we, or some other extraterrestrial intelligent civilization, use chlorofluorocarbons (i.e. hairspray) or other aerosol particles to engineer an optimal climate or as by-product of their industries?

Read more about this project.

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