2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/199742We discuss the relation between the superradiance phenomenon and the instability of rotating black holes in higher dimensions. In particular, we point out that the superradiant instability of a massless scalar field around a simply rotating Kerr-adS black hole implies the gravitational instability of that black hole for tensor-type perturbations.References added. 13 pages, 3 figures. A talk given at ICGA8 to be published in Prog. Theor. Phys. SupplementHigh Energy Physics - TheoryGeneral Relativity and Quantum Cosmologytext