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Re: starship-design: Fermi's Paradox - Drake's Equation will have to be rewritten

>Such an explanation may be a solution to a half-century-old question
on why
 >we have not seen evidence of extraterrestrial life. The problem,
 > by
 >Nobel laureate physicist Enrico Fermi and dubbed the "Fermi Paradox",
 >that a civilization traveling at only one-thousandth the speed of
 >could traverse the galaxy in 100 million years, far less than the age
 > the
 >galaxy or the universe. "Where are they?" Fermi was said to have asked

  Waiting for sombody to put out the welcome mat is my guess.
  I can see them arriving and leaving with very little impact.