  A separated net is a set of points which is relatively dense and uniformly
discrete (another name for a Delone set). We are dealing with tilings and
separated nets in Euclidean spaces and with the question whether a given
separated net is biLipschitz to the integer lattice. In this paper we show, as
an answer to a question of Burago and Kleiner, that the net that is obtained
form the Penrose tiling is biLipschitz to the integer lattice.
