  We argue that the main feature behind novel properties of higher-dimensional
black holes, compared to four-dimensional ones, is that their horizons can have
two characteristic lengths of very different size. We develop a long-distance
worldvolume effective theory that captures the black hole dynamics at scales
much larger than the short scale. In this limit the black hole is regarded as a
blackfold: a black brane (possibly boosted locally) whose worldvolume spans a
curved submanifold of the spacetime. This approach reveals black objects with
novel horizon geometries and topologies more complex than the black ring, but
more generally it provides a new organizing framework for the dynamics of
higher-dimensional black holes.

High Energy Physics - Theory;General Relativity and Quantum Cosmology