Vol. 42 (2011) ACTA PHYSICA POLONICA B No 11NEW 4D RESULTS FROM SUPERSTRING THEORY?Jerzy KrólInstitute of Physics, University of SilesiaUniwersytecka 4, 40-007 Katowice, Polandiriking@wp.pl(Received October 20, 2011)Recent advances in relating superstring theory with dimension 4 viaexotic smooth geometries on Euclidean R4 are reviewed. The string the-ory backgrounds and some configurations of Neveu–Schwarz and Dirichletbranes describe exotic open 4-smoothness. This serves as a link to 4Dphysics....