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ET -------- or -------- NO ET
If Earth's Humans are the only technologically advanced
intelligent material life in
then, as Ellie Arroway's father said in the movie version of
Carl Sagan's novel Contact,
It's a Terrible Waste of Space.
it is up to Earth's Humans to use the Space Beyond Earth
in Our Universe constructively,
so that it will not go to Waste.
How can we do that?
First, we have to explore and travel,
- by robot exploration ships,
- by robot ships containing biological material that can seed
fertile places, and/or
- by ships actually containing Humans,
throughout Our Universe, including our Milky Way Galaxy.
Then, we have to set up a communications network throughout our
Milky Way Galaxy.
How would we build such a Galactic Communications
To carry information over long distances, we should use
To carry more information, we should use high-frequency Gamma
To be energy-efficient in transmitting information from point to
point within the Milky Way, we should use Gamma Ray Beams that are
Gravitationally Focussed by a star near the point of origin.
From a point in the path of such a Gamma Ray Beam,
the Gamma Ray Beam would look a lot like a GAMMA
What language should we use for
The Language of a TOE that not
only describes Physics, but also
All these Languages are equivalent and can be expressed
in terms of Clifford Algebras.
What if Humans Fail
to construct a Galactic CETI Communication Network,
but just stay on Earth in an Earthbound Global
Then, if there is Nobody Else around, our Earth and Sun
will remain an Island of Life in a Lifeless Milky Way Galaxy, until
the time when Earth's environment becomes uninhabitable by
Then, if there is Nobody Else, the Universe will be
cartoon at the top of this page was scanned from page xvi of
Intelligent Life in the Universe, by Carl Sagan and I. S. Sklovskii
(Holden-Day 1966), which is an English translation, expanded with
some commentary, by Carl Sagan of the book Vslennaia, Zhizn, Razum
Mind) by Iosef Shmuelovich Shklovskii
published in Moscow in 1963, parts of which were serialized in
Komsomolskaya Pravda and published in Priroda.
Here is a discussion of
how GRBs might cause extinctions of ( some? all? ) intelligent life
in our Galaxy.
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