... why does it take millions of years to fill the galaxy with
    sentient life...

The galaxy is one hundred thousand light years across.  At 1% light
speed, i.e., 3000 km/sec or 1860 miles per second, that is ten million
years.  At one-tenth that, i.e., at 0.1% light speed that is
one-hundred million years.  

We humans have a hard time going at 30 km/sec (19 miles per second) or
0.001% light speed.  At 0.001% light speed, that takes ten billion
years to cross the galaxy.

-- 
    Robert J. Chassell                          GnuPG Key ID: 004B4AC8
    [EMAIL PROTECTED]                         [EMAIL PROTECTED]
    http://www.rattlesnake.com                  http://www.teak.cc
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