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A Brief History of Time - An Interactive Adventure
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00546_Field_546.txt
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1994-12-21
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21 lines
for light to get from one distant region
to another, even though the regions
were close together in the early
universe. According to the theory of
relativity, if light cannot get from one
region to another, no other
information can. So there would be no
way in which different regions in the
early universe could have come to
have had the same temperature as each
other, unless for some unexplained
reason they happened to start out with
the same temperature.
(3) Why did the universe start out with so
nearly the critical rate of expansion
that separates models that recollapse
from those that go on expanding for
ever, so that even now, ten thousand
million years later, it is still expanding
at nearly the critical rate? If the rate