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 universe...is 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".
