Could a foliation by constant mean curvature hypersurfaces cover the   existence of most observers in our part of spacetime?
  We present a foliation by constant mean curvature hypersurfaces of a de Sitter space with a thin-wall Coleman-De Luccia bubble of de Sitter space inside, which covers the existence of most observers in our part of spacetime if we are placed in the region outside the bubble. 
Prado Martin-Moruno
gr-qc