Gap Fill - Extraterrestrial Life - Level 2


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Paragraph 2

Astronomers will use radio telescopes to search for life. They are located all over the . It is the first time for a project to search the sky for alien life. The signs are called "techno-signatures". These include alien chemicals, large of oxygen, non-natural structures, and light. An astronomer said: "Determining we are alone in the among the [biggest] in science." Another scientist said we are getting to finding out if alien life exists. She said this science is no longer , but "almost mainstream".

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