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We describe the behavior of 5-dimensional black strings, subject to theGregory-Laflamme instability. Beyond the linear level, the evolving stringsexhibit a rich dynamics, where at intermediate stages the horizon can bedescribed as a sequence of 3-dimensional spherical black holes joined by blackstring segments. These segments are themselves subject to a Gregory-Laflammeinstability, resulting in a self-similar cascade, where ever-smaller satelliteblack holes form connected by ever-thinner string segments. This behavior isakin to satellite formation in low-viscosity fluid streams subject to theRayleigh-Plateau instability. The simulation results imply that the stringsegments will reach zero radius in finite asymptotic time, whence the classicalspace-time terminates in a naked singularity. Since no fine-tuning is requiredto excite the instability, this constitutes a generic violation of cosmiccensorship.

Black Strings, Low Viscosity Fluids, and Violation of Cosmic Censorship