  A mechanism is presented, in which the mixing of right handed heavy Majorana
neutrinos creates a $CP-$asymmetric universe. When these Majorana neutrinos
subsequently decay more leptons than anti-leptons are produced. The lepton
asymmetry created by this new mechanism can exceed by a few orders of magnitude
any lepton asymmetry originating from direct decays. The asymmetry is finally
converted into a baryon asymmetry during the electroweak phase transition.
