The astrophysicist has authored a new book about the prospect of nonhuman intelligence in the universe.
Brazilian witnesses from January 1996 claimed at least one extraterrestrial survived the crash of a cigar-shaped craft.
For instance, what if we really are being visited by aliens from other worlds and they turn out to be aggressive, violent, ...
Astronomers have discovered a faint, elusive planet orbiting a young star after more than a decade of cosmic hide-and-seek.
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