  We develop a type of Kaluza-Klein formalism in $(4+4)$-dimensions. In the
framework of this formalism we obtain a new kind of Schwarzschild metric
solutions that via Kruskal-Szequeres can be interpreted as mirror black and
white holes. We found that this new type of mirror black and white holes
solutions in $(3+1)$-dimensions support the idea that the original space-time
can be extended to $(4+4)$-signature.
  Using octonions, we also discus linearized gravity in $(4+4)$-dimensions.
