  Two scenarios of low temperature baryogenesis in theories with TeV scale
gravity are discussed. It is argued that strong gravity at TeV energies is very
favorable for baryogenesis. In both scenarios the proton decay is either absent
or suppressed far below existing bounds. On the other hand, neutron-antineutron
oscillations are at the verge of discovery. Some other rare decays with
non-conservation of lepton or baryon numbers are predicted.
