  We show that in the limit where the number of spacetime dimensions D grows to
infinity a very large class of black holes (including non-extremal, static,
asymptotically flat ones, with any number of gauge-field charges, possibly
coupled to dilatons) possess a universal set of quasinormal modes whose complex
frequencies depend only on the horizon radius and no other black hole
parameters. The damping ratio of these modes vanishes like $D^{-2/3}$, so they
are almost normal modes, or 'quasi-particle' excitations of the black hole. The
structure responsible for the existence of these modes at large D is also
present very generally in other black holes.
