2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41932In models of large extra dimensions, the string and Planck scales become accessible at future colliders. When the energy scale is above the string scale or Planck scale a number of interesting phenomena occur, namely, production of stringy states, $p$-branes, string balls, black hole, etc. In this Proceedings, we summarize a recent work \cite{me0} on the production of black holes, string balls, and $p$-branes at hadronic supercolliders, and discuss their signatures.7 pages, talk presented in the SUSY02, DESY, Hambury, June 2002, references addedHigh Energy Physics - Phenomenologytext