  We investigate new and unusual signals that arise in theories where dark
matter is asymmetric and carries a net antibaryon number, as may occur when the
dark matter abundance is linked to the baryon abundance. Antibaryonic dark
matter can cause {\it induced nucleon decay} by annihilating visible baryons
through inelastic scattering. These processes lead to an effective nucleon
lifetime of 10^{29}-10^{32} years in terrestrial nucleon decay experiments, if
baryon number transfer between visible and dark sectors arises through new
physics at the weak scale. The possibility of induced nucleon decay motivates a
novel approach for direct detection of cosmic dark matter in nucleon decay
experiments. Monojet searches (and related signatures) at hadron colliders also
provide a complementary probe of weak-scale dark-matter--induced baryon number
violation. Finally, we discuss the effects of baryon-destroying dark matter on
stellar systems and show that it can be consistent with existing observations.
