Nonsingular Chaplygin gas cosmologies in universes connected by wormhole
  We present some exact solutions of the Einstein equations with an anisotropic
fluid exploiting the Chaplygin equation of state. The solutions describe
spacetimes with two identical T regions and an intermediate static spherically
symmetric R region containing a wormhole. The metric in the T region represents
an anisotropic Kantowski-Sachs cosmological model. Its evolution starts from an
event horizon and develops according to different scenarios including eternal
expansion, contraction and also a finite universe lifetime.
