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Chapter one
Extraterrestrial


What Are the Odds of Alien Contact?
Bringing the Drake Equation up to date.

It May Not Feel Like Anything To Be an Alien
Humans may have one thing that advanced aliens don’t—consciousness.

Why Discovering Martians Could Be Disappointing
There are two kinds of extraterrestrial life with very different implications.

Galactic Settlement and the Fermi Paradox
The results of galactic colonization models are a mixed bag for SETI optimists.
Related Facts So Romantic
“Reality provides us with facts so romantic that imagination itself could add nothing to them.” —Jules Verne
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