Interpenetrating subspaces as a funnel to extra space
  New solution for two interpenetrating universes is found. Higher derivative
gravity acting in 6-dimensional space is the basis of the study that allows to
obtain stable solution without introducing matter of any sort. Stability of the
solution is maintained by a difference between asymptotic behavior at spacial
infinities. For an external observer such a funnel looks similar to a spherical
wormhole.
