  In any physical system, when we move from short to large scales, new
spacetime symmetries emerge which help us to simplify the dynamics of the
system. In this letter we demonstrate that certain variations on the symmetries
of General Relativity at large scales, generate the effects equivalent to Dark
Matter. In particular, we reproduce the Tully-Fisher law, consistent with the
predictions proposed by MOND. Additionally, we demonstrate that the dark matter
effects derived in this way, are consistent with the predictions suggested by
MOND, without modifying gravity.
