The Physics of the Far Future
  We observe the past and present of the universe, but can we predict the far
future? Observations suggest that in thousands of billions of years from now
most matter and radiation will be absorbed by the cosmological horizon. As it
absorbs the contents of the universe, the cosmological horizon is pushed
further and further away. In time, the universe asymptotes towards an
equilibrium state of the gravitational field. Flat Minkowski space is the limit
of this process. It is indistinguishable from a space with an extremely small
cosmological constant (\Lambda -> 0) and thus has divergent entropy.
